Your credit will have to grow incrementally unless secured by assets (residence, cash, CD's, equipment).This is what you will find at most large banks.

Domestic hot water, and; Electricity adequate for lighting and any mechanical equipment within the home.

There might be a little bit of an identity misconception in the OP.All Notes are forms of security.

For only three units, the payback would take a very long time, but if you have a decent, and appealing, location for the laundry facility, a good set of Maytag equipment should be generally maintenance free with such low usage.

But with focus you'll be equipped with questions to interview persons. 

Identical homes in the neighborhood have recently sold for $310,000.00. 

When I was in college I would flip cars and car / truck performance accessories from junk yard and list them on Ebay and Craigs list.I own a sign company also and $5K for that business is not enough to do anything, with equipment... 

The more identical the sold properties are to the subject property, the better. 

In my experience 99.9% of home buyers prefer buying a home with no electric bill as opposed to an identical home with an electric bill, so I believe solar differentiates the home from close comps at the very least and increases salability.

When I got it, I found a construction site that didn't need it and they had equipment to load me up.