To offset that brain scatter id add a higher percentage to repairs as a worse case one size fits all model and be prepared and if nothing happens you'd just be in favor.

For this model, what are good lot sizes?

I don't care for that business model and personally won't deal with anyone like that.

So I'm considering these different electric options:1) cadet wall heaters with built-in fan2) plug-in panels (VonHaus 450W Wall Mounted Electric Flat Panel Heater - Paintable Slimline Low Energy Eco Ceramic Space Heater (23.5 x 23.5 x 0.4 inches) https://www.amazon.com/dp/B01LZ3NE3E/ref=cm_sw_r_cp_api_H0Q1ybQHE3DNG)3) convection heater (http://m.homedepot.com/p/Stiebel-Eltron-1000-Watt-120-Volt-Wall-Mounted-Convection-Heater-CNS-100-1-E/206160725)So I'm wondering if you have experience with any of these models or styles.

According to her, investment strategies, and working models are a close kept secret that any experienced investor would not share.

New boilers, i.e. high efficient models, have a pump that never stops, but will actually speed up or slow down relative to the amount of heat you want put out.I have stayed away from boilers like the plague, however I just finished rehabbing my first property with a boiler installed in 2007 and have been pleasantly surprised by it.

Basically, my business operational model begins and ends with Maximus. 

I advise anyone I know who is starting off to find at least 3 rentals first and get comfortable with that model.

If you have a good Lender/Mortgage Broker - they can help you choose the right loan that fits your property, your business model & your exit strategy. 

@Kalin Wilson - After implementing an average leased price per sq ft calculation in our model, I must caution against putting too much faith in the number, as it tended to be either way too high or low.