It may be as you say zzark, I am no expert in hotel management. However, I stand by what I wrote about finding out which degrees tend to lead to which jobs/income. A hotel/hospitality degree is by its nature limited to a specific field and frankly, one that does not pay overly well for the average holder of the degree.
The same cannot be said of an MBA or a degree in some other field such as engineering, health care or computer science. You do not find someone with a degree in hospitality becoming the CEO of General Motors. I doubt the CEO of Hilton has a degree in hotel management either.
I think far too many people think getting a degree of any kind is good enough. They do not look far enough into the future to evaluate the value of a specific degree. Hence all the taxi drivers with a degree in the arts & humanities or whatever. http://education.yahoo.net/articles/six_in_demand_degrees.htm
Not all degrees are born equal is what I am saying and there are certain core degrees that give entry to a far greater field of opportunities than others. A hotel/hospitality degree is not one of those. Wanting to work in the hospitality industry is fine. But there are half a dozen degrees that will give you an equal chance of working in that field. However, not all of that half dozen will help you if you decide to change fields down the road.
In the case of the OP, I would seriously suggest continuing to work while getting a degree at the same time. I was a high school drop out who then went back to night school to get a degree in Marketing and then an MBA. During my 25 year working life I changed industries about 6 times. Try doing that with a hospitality degree. I started out as a salesman just like the OP but moved up into higher management over time. I ended my career as a business consultant with Fortune 500 companies as clients. My sales skills allowed me to retire at age 43. In my opinion, sales is THE most remunerative career to have. I earned more than my doctor, lawyer, dentist, or accountant ever did.
You can set your sights at managing a Hilton hotel or you can set yourself up to to manage all of the Hilton Corporation if you have the ability to get you there and the RIGHT background degrees.