Property Manager has advised its not worth the additional expense which could be considerable.

So you put up $5K consideration for a 90 day option.  

I just read an article that said this is the hottest market in the country for rise in home values.

This may change your strategy considerably, so you should explore this topic first.

As long as the financial considerations (rent, utilities, appliances) and ending date are the same, you can change any terms you want to.  

That involves consideration on forming a legal entity that you might have to hire someone to advise you,  figuring out your financing that you pe-qualify for and get a loan letter from the lender that will help you and give the owner a comfort level, and a new business location that is convenient and has minimal distractions.  

Thank you sir, ive considered trying to get hvac certified this summer too so i can do that aswell, i have no desire to learn electrical however as ive been shocked one too many times and dont care to get shocked again, but i agree its a shrinking industry which is good for us younger guys , my only concern is rising interest rates ruining my plans before they even get started

It has pros and cons. pros: the liability is within that LLC, I.e. if you are liable in a lawsuit, you don't owe more than the value of that LLC, I.e. the house.cons: might be harder to get financing. also more paperwork.There are more to it, but the points above stand out from most people's consideration.

If so, people have rented out timeshares before as investments so it would make sense - and w/ the rise of Airbnb, this might actually work.

Ideally you would like to see a cap rate that is compressing or going lower as that would be an indicator values and rents in the area are rising.