DSCR Loan Length

[Ronald Fontenot Jr]

I've found a 4 plex that has piqued my interest. It's recently remodeled and vacant, but ready for renters. It has one 2/2, two 2/1s, and one 1/1. I've run analysis conservatively and it seems it will cash flow fairly well. 

I'm not interested in house hacking, my family is too large for the 2br units. I'm a 1099 and always have been, so leaning toward a DSCR loan.

How long are typical DSCR loans offered for? And do they require the units to have a track record of rent as they are vacant and seller has no rent roll or ledger.

Any advice appreciated!