I see neighboring properties of mine that are a comparable size and I know they use dynamic pricing of some kind, but no one has exactly the same price as me.

If there are people there will be a need for MTR-- getting your location, unit size and pricing to align is the magic sauce.

Check out the chart showing the fast rent growth and declining rent growth cities, which could help inform your decision on growth markets. 

For a rule of thumb, replacing a commercial boiler can range anywhere from $20k to $150k, depending on the size, age, and efficiency.

The cost per sf skyrockets as house size decreases. 

.: I am trying to learn and understand... someone told me that its not just size of the home or level of the flip that determines profit, and that in some markets, what is considered a typical profit is 300k based on the 70% ARV formula.

Okay that seems like good news for making a BRRRR work in my market since I was looking to spend something like 45-75 on rehabs for these smaller sized homes. 

Look at recently sold properties in the same neighborhood that match the size, condition, and style your property will have post-rehab.

Rate will be highly dependent on loan size, credit score, LTV, location, and property type, as well as a few other factors.

Best to call city hall for the town you are buying in to see what if any rent control rules are in place. see link below if you require additional information and call the Jersey City Landlord Tenant relations office. https://www.jerseycitynj.gov/cityhall/HousingAndDevelopment/...Jersey City CPI chart on recommended rent increases: https://cdnsm5-hosted.civiclive.com/UserFiles/Servers/Server...The state with the highest eviction rate in the country right now is South Carolina.