Multi Family Comps and Existing Tenants

[Jack Perfett]

Hello BP! I am underwriting a quadplex right now and I am running into a couple questions that I hope I can get some help on. One being this quad plex consists of a main house (2 units), a cottage, and a large garage that rents at $750 a month. The rents are defiantly low and have to been raised in 5+ years. I am trying to get a understanding of where they should be but a majority of the comps in the area are 1-2 bedroom units in large apartment complexes that have pools, workout facilities, etc. How much higher rent do these amenities warrant if any compared to my property. 

Secondly, the existing tenants have leases that don't expire until 2023,  2024,  and 2025. What should I be concerned about other than not being able to bump rents with tenants that have signed for such an extended amount of time?

Thank you,

-Jack Perfett