There are new construction homes about 2-3 miles away going for 190-200,000 but I think they may be a bit larger than what I am building.

The tax savings could be larger than the regular income. 

If that is all ok then get a very good local realtor to run comps in that area to determine the conservative value of the home once you've completed the renovation work(ARV).

Scotia Bank in Costa Rica will allow you to open up an larger account as 'business owner' if you own your properties in an LLC but the process of opening an account is much more difficult. 

Network in person, see if they have a publication where you can post your deals and what you are looking for, and if there is a larger annual conference for investors locally consider getting a vendor table to talk about your business and what you are looking for.

Many DSCR programs require an investor to have a mortgage history- there are some DSCR mortgage programs that will work with investors who are renting- some refer to them as first time home buyers (FTHBs)- DSCR loans are only for investment properties where the owner isn't living there. 

We’ve found a great option for us in Tennessee with a cabin (currently used as a str) and a mobile home.

Quote from @Lisa Albright: Hi All,Newbie here, just a quick question we are building an addition on our second home, we have a primary residence, and two rental properties.

This year is slower than normal because mortgage rates and home prices are so high.

With a budget of $300K-$400K, you could potentially find single-family homes or small multi-units in those areas.I'd recommend researching rental demand near universities like Duke or NC State or even checking out neighborhoods with strong job growth near tech hubs.