...but it takes a some time.

There is no fast way from kochkor to osh. You are looking at atleast a full day. You have 3 choices:

Via bishkek - most simple, lots of mashrutkas, may be quickest. (If I just wanted to get between the 2 quickly and cheaply I would take this option).

Via kazarman - more complicated in that afaik you still need private jeep for at least some of the journey. I would only recommend this way if you have the time and inclination to make the most of kazarman (i.e. saimaluu tash visit).

Via Sussamyr valley - no public transport so requires private car/hitchhiking. Even though it's shorter than going via bishkek the road is bad so may not be much difference in time. If you want some nice hiking around kyzyl oi it can be a good option.

For cloud forest choose San Gerardo de Dota area or Monteverde. No need to go to both.

You say Corcovado so you have to decide: go to Puerto Jimenez and book a three day trek to Sirena in Corcovado or go by boat from Drake Bay (as explained earlier). You can also see lots of wildlife in Cabo Matapalo and enjoy the rainforest in Dos Brazos de Rio Tigre.

So yes, you can take a bus to Puerto Jimenez (or bus and boat to Drake Bay). Then you can go to San Gerardo de Dota. We went by bus but once there it is hard to get around without a car. We managed but we hitchhiked. Bus to San Jose. Rafting on the Rio Pacuare with drop-off in Puerto Viejo de Talamanca, explore the area south of PV, then a bus to Cahuita (amazing National Park, lots of wildlife), then bus to Limon, taxi/bus to Moin and scenic boat ride to Tortuguero (ask your hotel in Cahuita about reserving a spot on the boat). Then boat to La Pavona and bus to Sarapiqui (several bus changes) or shuttle to Sarapiqui where you can stay at La Selva.

Or fly (maybe one way) to Drake Bay (or bus/boat) and then back to San Jose. Go to Monteverde. Arenal. Sarapiqui. Tortuguero. Cahuita, the area south of Puerto Viejo de Talamanca and your last day rafting on the Rio Pacuare with drop-off in San Jose.

As indicated, check at the Osh Guesthouse even if you have also other places where you can meet independent travellers.
It's also possible to move by shared/public transports. Not too challenging even if it can be more difficult for some parts (remote places)
Always possible to use a contracted lift.
Hitchhiking is doable too.

Michel

Hitchhiking has almost disappeared in Israel and most drivers are unwilling pick up a hiker. You will need several lifts to get to Mitzpe Ramon from Jerusalem and you may have to wait a long time for each one, stranded at lonely junctions. Nobody here will recommend hitchhiking. You are coming for a very short visit and you have to accept that you can't see everything. If you go to the Dead Sea as suggested you will be driving almost entirely through desert scenery.

Yunnan is a good idea, you can easily spend a month or so there then heading to either Vietnam or Laos by land. You don't have to go to Nanning, from Guilin there are trains and possibly long-distance buses going to Kunming.
As for the weather, Yunnan is a big province, weather can be very different between south and north. August is a hot month, you might want to go north for some cool air. eg, from Dali slowly up to Deqen, then hitchhike (or walk the Cizhong-Dimaluo trail across the mountain if you like hiking) to Bingzhongluo and head back south along Nujiang river.

We took the 9 am bus from Puerto Jimenez to La Palma and in La Palma we took the 11:30 am bus to Drake Bay (it took 90 minutes). BUT we were told this bus only runs in the dry season. So it will probably run in January if it has not rained too much. If it has rained a lot the bus won't run as it has to cross several streams and rivers. We were told we could try to hitchhike if the bus was not running. The other option would indeed be to take a bus to Palmar Norte, bus or taxi to Sierpe and boat to Drake Bay.

I don't know if the bus from La Palma to Drake Bay runs January 1st. Best to ask your hotel.