There likely is an account for major repairs called CAPEX and minor repairs so look for a bank account that is shared with the uncle too.Now for the Trust, it will have him as the new Trustee once your mom passed, but it may have a way to change that to you, sometimes at a certain age, or happening like marriage. 

I review the county marriage and divorce records along with the grantee/grantor index.

The due on sale clause simply gives the lender the RIGHT to call the loan due upon transfer of title.The exceptions to calling the loan due in the Garn St Germain Act are below....See http://www.law.cornell.edu/uscode/text/12/1701j-3(d)Exemption of specified transfers or dispositions With respect to a real property loan secured by a lien on residential real property containing less than five dwelling units, including a lien on the stock allocated to a dwelling unit in a cooperative housing corporation, or on a residential manufactured home, a lender may not exercise its option pursuant to a due-on-sale clause upon—(1) the creation of a lien or other encumbrance subordinate to the lender’s security instrument which does not relate to a transfer of rights of occupancy in the property;(2) the creation of a purchase money security interest for household appliances;(3) a transfer by devise, descent, or operation of law on the death of a joint tenant or tenant by the entirety;(4) the granting of a leasehold interest of three years or less not containing an option to purchase;(5) a transfer to a relative resulting from the death of a borrower;(6) a transfer where the spouse or children of the borrower become an owner of the property;(7) a transfer resulting from a decree of a dissolution of marriage, legal separation agreement, or from an incidental property settlement agreement, by which the spouse of the borrower becomes an owner of the property;(8) a transfer into an inter vivos trust in which the borrower is and remains a beneficiary and which does not relate to a transfer of rights of occupancy in the property; or(9) any other transfer or disposition described in regulations prescribed by the FederalHome Loan Bank Board.

@Bill BrandtDoes any of this change if you owned the property prior to marriage. 

I have wanted to be on my own my whole life and I was for a number of years but I got suckered into a bad marriage, a bad job, lots of other stuff, now I'm in good marriage, two awesome little girls and all the support and reason to succeed in the world. 

So here are the two deals that I've done with my partners.Deal #1Acquisition: Family looking to upgrade Purchase: $37,000 cashRehab: $7,000 cashRent: $750/moTax+Insurance: $100/moROI: 18.6% Deal #2Acquisition: Marriage of convenience and liquidation of assets Purchase: $52,000 cashRehab: $25,000 cashRent: $1400/moTax+Insurance: $150/moROI: 19.5% My key takeaways from these two deals are to save the 10% for maintenance and CapEx, leveraging contractors better and more often, and to not use my own money. 

The goals would be equitable distribution to the 4 blended marriage kids, fair compensation to the kid who is executor,  and any instructions on whether to demand the 4 properties remain as income for future generations or sold to buy cars, trains and automobiles for the decendants.

That is a touchy ask, but could prove invaluable to you if the unfortunate occurs (50% of all marriages).

The relative said he was only related by marriage and couldn't really verify anything.

Real estate partnerships are like marriages.