Thanks @Michael Smythe, but don’t plan on growing that quickly and Stessa plans to add the functionality so I’m looking for something to tie me over for now.

Their rental prices are not a function of the housing market.

If you could have the exact same mortgage you have now EXCEPT that it functioned like a line of credit (ie. you can put all of your income toward it, but then still have access when you need it), would you want that?

Once you have a shortlist, sign up for an account with each one and test them extensively to see how they function.

That said, stock pools are inexpensive but I'm not sure they are anything more than visual candy for your listing - and perhaps more hassle and most adults won't look at that anything like a hot tub experience. 

This must be a 1920's duplex and they were built to function without a sump pump, which were invented right after WW2Who were the lenders?

You sometimes go into the blind off of visual inspection alone because it's a good enough deal to absorb those types of costs. 

Constructing an IRR timeline on both options using the timeframe you decide on will help you visualize the better yielding investment.

si=rYPoMqzL8hZ8lGPR This project involves renovating and revitalizing the existing property to transform it into a modern, functional, and aesthetically appealing single-family home.

Home buyers are very easily visually influenced.