I've worn three hats in the seller financing world (as a property buyer, as a property seller offering terms, and as an investor that buys seller financed note). 

I want to buy it and build a prefab home 3/2 around 2k sq ft.   

Do you need to sell it in order to buy something else? 

I work with mainly buy and hold investors here in Cincinnati.

Too bad you can't buy something owner-occupied, put 5% down with the best interest rate, live in it for 12 months (and fix it up), rent it out and repeat the cycle.Here's some other info you might find useful:----------------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

I need a list of sites which allow you to shop for and/or buy commercial real estate.

Imagine making millions of dollars over the course of your career and then having to pay 30-50% every year to uncle sam instead of compounding that cash over time.This is exactly what real estate professionals have learned to mitigate.To reduce their taxable income, they just buy a building every year, do a cost seg, and use depreciation to reduce their tax liability dramatically.Their personal wealth snowball grows much larger and much faster than their W2 counterparts who give most of their money back to the government each year.Following this strategy as a real estate professional is one of best ways to end up with a much larger net worth at the end of your career.

Looking for advice in defining our buy box.

I do know one of the people who works for me has a 2 year work permit (temporary) and she and her husband were able to buy a place in Alberta.BC and ON are very tenant friendly.

Plus buyers might feel rushed into making a buying decision as the longer they shop, the more hours they are getting billed for.