Leonard  While I'm a business broker, let me start by saying that I would not represent your business, as I work only in Maine, New Hampshire and Vermont, so this isn't self-promotion - but I'll give you an idea of how we value a business that we're representing for sale.A business is valued based on the total cash flow to the owner from all sources. 

I have at least one lender and one agent, but would like to fortify those positions with other reliable sources as well to round out the Core 4.

It's likely to be abused and a source of conflict between your three renters.

Friends, family, private sources, banks. 

Which makes it the best source of creating lists based on filters.   

For your financing needs now, I know of no sources but maybe someone else on here does. 

Would you help with sourcing contractors as well as critiquing their work?

Including volatile food and energy prices, the PCE index jumped 3.6% year over year and 0.6% from March.

If accomplished, enhancing the latter would be great.Much of what I have learned so far has come from American sources like 'The Book on Rental Property Investing' by Brandon Turner, 'Rich Dad Poor Dad' by Robert Kiyosaki, Real estate books written by Ken McElroy, and of course the Bigger Pockets podcasts. 

Once we have a tenant she plans to refinance, use the lease(75%ish) as another source of income and co-sign on my first property!