I live am a UK resident (but still a US citizen).The house is currently rented to a tenant that has lived there about 10 years now and I have no reason to immediately sell the house but that is the goal by the end of the year.My initial questions are regarding handling paperwork while I am still in the UK with regards to signatures, banking, etc. 

Erie has a large immigrant population and so I'm assuming they'll be cool with receiving houseware stuff as well that's of little value but things that still shouldn't be thrown out as someone can use them. 

(https://www.uscis.gov/working-united-states/permanent-workers/employment-based-immigration-fifth-preference-eb-5/eb-5-immigrant-investor-regional-centers/approved-eb-5-immigrant-investor-regional-centers) Anyway, our former governor, Mike Rounds presented an overhaul bill backed by Graham (sen SC) and Cornyn (sen TX) and is trying to get the center back.

As far as citizenship and visas, you should be talking to an immigration specialist, not a bunch of random real estate investors.

She has done fairly well for an immigrant into the US from MX.

sexual identity or orientation, 2. gender identity or expression, 3. conviction or arrest record, 4. credit history, or 5. immigration status. viii.

They immigrated from Singapore a year ago, and had never lived in a townhouse.Should I make a visit to ensure the house is being taken care of, and they are not making mistakes and causing damage?

The guidelines, which can also be found in the text here, are:i. a rent freeze;ii. just-cause evictions;iii. mandatory documentation with any just-cause eviction;iv. no source of income discrimination;v. coordination with local housing authorities to make new vacancies eligibleto voucher holders;vi. provision of 10 percent equity to tenants; and,vii. no admissions restrictions on the basis of:1. sexual identity or orientation,2. gender identity or expression,3. conviction or arrest record,4. credit history, or5. immigration status.viii.

(I do not stand by the following information, please perform your own due diligence to confirm its accuracy)Landlord Relief Fund- The Secretary of HUD will reimburse lessors for any loan payments made during the suspension period- To be eligible for this reimbursement, relief applicants must adhere to the following:For a 5-year period, the following must be adhered to:Monthly rents will be frozen to the amount charged to the unit at the beginning of the suspension periodTenants may only be evicted for Just-Cause reasonsTenant applications may not be discriminated against based upon income, gender, sexual orientation, criminal record, credit history, nor immigration statusNew vacancies in the property must be announced to the public The lessor may not collect an arrearage in rent owed by any tenant as of the expiration of such 5-year periodLessor may not retaliate in any way against tenantsLessor may not report any tenant to credit bureausAlso during the suspension period, tenants will be reimbursed for any payments made to the lessor by HUDA tiered-system will be put into place to determine landlord relief priority.

My wife and I have been stationed in the UK for the past 3 years and we have 1-5 more years here.