Usually the lending amount is a percentage based on the LTV (Loan to Value) or LTC (Loan to Cost). 

Conventional lenders lend on condos every day, but that they have to be qualified, "warranted"....generally a certain percentage have to be owner occupied, less than 10% owned by any one person/entity, etc. 

We currently live in the Riverside neighborhood, and may consider investing here, due to the high percentage of multifamily homes and the fact that we pay Columbus taxes but go to Dublin schools.

From this data, you can utilize a website bestplaces.net that will give you a breakdown of the percentage of homes that sold, in various price ranges, for a given zip code.

They require more babysitting and it's hard to find a competent property manager that works in the rough areas because the management needs are more involved and the rents are cheaper, meaning less of a management fee on a percentage of rent basis.

Gross rent per month is usually the only figure that's calculated as a percentage of purchase price (to firstly see if it meets your investing criteria eg. 1% or 2% "rules"), whereas all expenses are then (usually) worked out as a percentage of rent - not purchase price (eg. the "50% rule")!

Percentage of sale price?

If its a multi, banks will include a percentage of rental income to offset some of the expense.  

Sometimes you have to go back and do some digging if they settle the property in an LLC so make sure the non-circumvent includes personally as well as any entity they may be part of no matter ownership percentage.

THe think is how to get a loan from a US institution, as a non resident non US citizen, cant seem to find information of who gives it, how much percentage, and how tedious is the creditation process.Will be happy to be in contact with you.