Even with an FHA, the work needed can creep upwards of similar or more than the closing costs, so you're looking at doubling your cost to own a multi-family property. 

You could even look into Opportunity Zones.Other options are doing a Cost Segregation study depending on the property.To drag out the gains, you can do a Deferred Sales Trust, or Installment Sale.

Be sure to no only account for the cost of the cash for keys but your additional holding costs while you have to wait to get them out.

The result is that the cost to add a hands off ADU is much greater than will be added by the ADU.  

A Local Realtor to the property can do a broker price opinion, cost varies.OR Pay for on of the 100's of AVM services

. +30% vacancy for 24 months, caused by two evictions, one unit on market for 7 months, and the two new properties taking 1 year in renovations instead of 4 month estimate (~$30k of lost income above assumption of 10%)2. $45k from several unexpected large repairs (water leaks, roof collapse, siding rot, plumbing main line, etc.)These issues are also causing me to rethink the assumptions in my model, increasing my vacancy rate from 8% to 12%, repairs from 5% to 20%, and capex from 5% to 20%.

It is fairly low-cost and efficient (you can always scale your entities as you grow; there is no need for an ultracomplex structure at the outset), but it is essential to ensure that entities are appropriately maintained. 

I'd like to explore card operated laundry to provide that as an option for tenants, to offset the cost of running the washer and dryer while I pay for utilities. 

Based off previous property taxes payed by the family member, we estimate the property to be worth roughly 100k once livable.

This of course can prove to be a costly process!