In return perhaps I can be of some assistance with online marketing and video production.

Current rents: you can glean this information through online sources as well as old-school searching (walk-ins, calling the buildings)Talk to local brokers to get the inside scoopMarket analysisCheck to see if building is in a flood plainYou can ask for, but these items are usually provided after signing a contract: Leases for lease auditing against bank statements, tax returns and leases (usually not provided before a contract has been signed).Tenant payment historyViolations, delinquenciesLease addendum and/or other agreementsTax ReturnsBank StatementsUtility billsCan RUBS be implemented (some municipalities may not allow it)Service contractsReserve fundsEnvironmental assessmentEmployee recordsStructural issues including foundationEmployee historyOther value-add features that can be added include:Trash valetCar portsStorageDog parksTo be honest, a similar level of due diligence is required across multifamily and manufactured housing (mobile home parks).Best of luck!

Practically speaking, your DTI is not affected unless your applying for a loan or in someway using the DTI calculations in something? 

@Stephen Rossi and welcome to BP, it has everything you need from free online educational videos to connecting to other investors, you can't go wrong on this site!

It seems to me that you just went online and found a property and just read the description and put the exact numbers on your calculations.

When it does get signed, that becomes the binding document for the transaction.Regarding commissions; I have seen this in various online confidentiality agreements (CA).

Try and seek out a coupon on line at Harbor Freight or in one of their coupon books at the store and sign up so they send you one when they are issued.

While I haven't met her in person, she's great online.  :-)  I also recommend @Dawn Brenengen. 

I've heard somewhere online about the "Seller Side Only HUD" or something to that effect..looks like it isn't true. 

Also browse your local market online and by driving around to learn about neighborhoods, home values, etc.