Or all the sites available to list an available rental.

generally speaking this would need to be done with either seller financing with release clauses or all cash .Major issues are going to be zoning and what can be done.. target props you like get feedback then go to the city or county whoever is the controlling agency and ask to talk to a planner this can usually be done over the counter will give you a quick look at what can and cannot be done. 

If you can do this by having a renter pay most or all of your living expenses while you live for free or close to it on a different floor you are setting yourself a solid foundation.

Is your goal based on retirement planning, tax savings, generational wealth, or all of the above?

Do all the houses on the block have a garage to park a car or all have bootleg units?

I only ask because for me, I am an all-in or all-out type of person and that has worked well for me. 

Any or all answers would be very helpful, thank you!!

@Jordan Richter Basically the seller would carry most or all of the downpayment and at the end of the loan term you would make one big payment on it.

After months of due diligences, (sometimes folks get lucky and it's weeks or even shorter) , they find a property that actually will perform well and meets most or all of their criteria - only to talk them selves out of it for one reason or another. 

If done right, you can recoup most of or all of your investment costs once you refinance at the end of the build.