We are converting our house into a rental property and there is an interior security camera (part of a NEST system) in the main living area Is there any reason I have to remove it when tenants occupy the property?

I decided not go to with it as the cost to convert from that system to A/C is hard to estimate.

I want to eventually start an alternative/DIY homes contracting business where we build upscale container homes, geodesic domes, tiny homes, convert trailers into themed hotel rooms etc so seeking for some solid advice in that realm. 

If you convert the current into a rental, then you will be limited in terms of the options to access the equity.

If you elect to convert gross leases to NNN leases, you'll most likely need to reduce the rate so it is equivalent (or maybe slightly above) the amount the tenants currently pay.Before you walk down this road, make sure the commercial units are separately metered.

If you waited around for years between inspections In a c or d class neighborhood you’d likely be in for a rude awakening when you opened the door to your place only to find it has been converted into a crack house with graffiti on the wall and a basement with two foot of standing water in it .

Converting from POH to TOH is easier said then done. 

(Sadly, but true, for now).Another potential is to convert the property into a restaurant location and sell it right away with a profit.

It has four 1 bedroom apartments and an office that was a converted house.

When I look online, the widest I see is 8.25 inches (hardie).