Any legit contractor with proper experience, a decent rep,  a gc license and insurances can typically be approved.You absolutely want a Lender with plenty of 203k experience....they may give you a couple of contractor names they have approved, or not.

Also many markets are overpriced and foreigners oftentimes don’t know that because they don’t do their due diligence properly.

The fact they are complaining online might be an indication the property manager dealt with them properly so be sure to ask the manager for their side of the story.I hope this basic guide helps.

I am an buy and hold investor looking to expand to the Hagerstown, Maryland market.

If you want to keep the tenant, tell them that things need to be cleaner, and advise them to buy poison or something for the mice... then reinspect.... maybe every other month for a while.If you don't want to keep them, give them a termination letter with proper notice. 

I am 22 yrs old and  actively trying to expand my knowledge in Real Estate Investing.

You have the right mindset already so just expand on it.. different markets close by and asset classes A/B.. . 

Easiest would be to give proper notice and terminate.

Then expand out.

You have to read the contract properly and figure out who is responsible for the repairs.