I am under contract to buy one in North Miami.

Currently under contract to buy a SFR and a fourplex in Miami area.

Having designed and owned investment properties before (simple rental units), I'm interested in taking this to the next level - more than likely in Miami or LA.

Who pays heat?

Duplex (2 on a lot) 3/1 House built in 1900 with large kitchen, finished basementBack unit built 1998, modern 1/1 open floor plan with radiant heat, heated 2 car shop/garageAsking price: $299kOffer of $225k max, owner carry with $15-18k down, 3-4 year carry amortized over 30, refi into conventional.Potential rents: $2300 mo (ballpark low market): 1400/900.

How difficult would it be to separate the boiler into different zones so the tenants pay the heat?

Who are the international buyers hunting online for property in Miami these days?

Give him a 90 day note, going 6 months he may lag behind thinking he has time, perhaps time is not really of the essence, he'll end up in putting it on the market in January or February and your market may not heat up until April.In other words, you need to know your local market, the scope of work, the time really required, the borrower's work load, his abilities and past performance.

I don't know much about the areas but I also know that I will never get those kind of returns here in Miami lol

I live in Miami, and invest in Tampa as well.