Adverse Possession of Abandoned Land in Texas

[Jeffrey H.]

I own a long term buy-and-hold parcel of land in small town, which has rental property on it.  The adjacent property to mine is a small acreage vacant wooded tract that is abandoned.  I have attempted to get in touch with the owner (an estate - and trustee is addressed to an apartment) several times without luck.  There are 6 years of back taxes totaling nearly $4,000, most of which is penalties and fees.  The property is fenced only on the sides where the neighbors have erected them.  A tax foreclosure is probably within 12-24 months and market value is ~25K.  This land would be suitable for mobile homes, RV's, or other housing and city utilities could be extended from my property.

Realizing adverse possession is a long term process with risk, fencing, maintenance, taxes, and the associated legal hoops - are there any other "gotcha's" I'm not considering?  Thanks!