:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

Sometimes they forget to tell you that many tenants in Detroit don't pay (depending on the property manager skill and the type of tenant) - but taxes are very high in the city and so is insurance. 

These are all lower $ properties and not the strategy you use.

A lot of 'off-grid' places are not, which will lower their value and resale ability.Also, you are decreasing your potential market by choosing a venture like this..not everyone will find composting toilets as cool as you and I might.Having said that, I think it could be a great find, if it check all the the boxes.

Id go right into looking at local credit unions and small community banks for HELOCs (lines of credit) so you can have a lower blended rate and draw/payback as you please.For the 3F - Since this is free and clear, you would only be looking at 1st position options here in the world of financing.

Take the tax free sec 121 first and then 1031 the leftover.

In decades past, carriers were allowing people to carrier lower limits of insurance on their properties. 

In order to defer all tax you must purchase at least as much as your net sale ($500K ish). 

A 1031 exchange would use all of the tax in the purchase of your next property.

In US tax law, the depreciable lifespan of an asset is defined by its MACRS classification which stands for “Modified Accelerated Cost Recovery System.”Under MACRS, depreciable assets are assigned to different classes, with each class having a specific recovery period.