When you say "we," are you speaking about your business or your personal tax returns, or does your business flow into your personal returns because you file as a sole proprietor?  

It was their prior excuse for being nonresponsive and you let them know that is not an excuse.

When you file your taxes at the end of the year the accountant is going to ask you for your receipts or what and how much you want to write off using deductions.

Do you provide move in and move out reports How many pictures do you take of the property prior to tenant moves in and after the tenant moves outDo you get weekly reports when the property is vacant what prospective tenants are saying about your homeDo you provide monthly newsletters to your tenantsDo you hold investor education classes to help me become a better investorDo you have single point portfolio based management services?

Additionally, applicants can (optionally) upload tax forms and bank statements for our review.If you're looking for a website you can utilize on your own @Bruce Woodruff mentioned a couple that are popular.

One thing I would add here is to check prior landlord references, not just from their current one.

Some might not be livable at purchase but 5k still seems cheap unless there is something off with the data. maybe the prices were reduced on unlivable properties due to back taxes being part of the deal for the purchase.

Most cities don’t want a mobile home park in their city limits because the tenants take more money out of the tax system than they contribute.

The first thing prior to this would be to verify this is a good tenant, check the lease, and confirm with the owner with a payment ledger that they have been paying on time since they have been there. 

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).