We know of a bunch of the servicers but curious of others have servicers they prefer.

Zoning, buildouts, service contracts, advanced mechanical systems etc. none of which are encountered in residential.

Are you/your partner(s) foreign nationals or non-permanent resident aliens?

Please - do this today: Send her a Notice To Quit for Non-Payment of Rent; you will need to send this to her via USPS with proof of delivery required so you can use it in any legal proceeding.

If this is simply you not wanting to accept partial payments and the rent is current, stop accepting it - and send a Lease Violation/Notice of Quit for Non-Payment of Rent - and force the full rent to be paid per the lease or start eviction.  

As Chris mentioned, use a licensed servicer and let them handle it. 

hi all i am a new landlord and got my first rental property. tenants moved in in September and October. the first month was fine but when December hit it got extremely cold and the heating is electric. due to poor insulation in the home that we did not know about the heat has to be turned very high up to keep the home warm, however since everything is electric it is causing the electric bill to be $800. the utilities are the tenants responsibility. however because of this one of the tenants has been extremely non compliant with paying rent.

Correct2. 100 hours could work if it's more than anyone else spent on the property including non-owners3.

The courts will handle service via e-mail and delivery to the unit.

A good attorney, RMLO, and servicing company play a big part of this. .