My agent has asked the seller to take care of some of the work and she has agreed to the plumbing, so maybe 7500 of the additional work to be done.  

Very tough to do without good track record or being world’s best salesperson,in general there are not short cuts.  

Hi Michael,I live, work and invest in Panama and think it is an emerging market.

I have experience in construction and rehab projects so would plan on doing a lot of my own work and subcontracting out the rest to save money vs the alternative of hiring a contractor to do the whole project. 

So I take what you have and what you expect, estimate the time it would take in a whole year of work and create my flat rate.I notice short term rentals are about 1 hour a month of work per property, since we need to track each property's Profit & Loss for Tax time, this is also tracking a mortgage and depreciation as well for that property.

I figured I have plenty of time to take on the extra work and It will also help me cash flow more and help me get to the next property.

Do you know where these people get quality work and contractors for that price?

How does build to rent work and what builders are best for this?

Keep things tidy, keep track of your work, and ask for tips from guides and other people in the field.

Where I work and where the investment properties are/would be are about 150 miles apart.