Who has what percentage depends on the community property issue.I run title to determine the ownership of mineral interest here in Texas.

He used to come home looking like a coal miner!

I have remodeled houses in the area that has had this type of problem some repairs have been miner and some major.

There is an interesting confluence of the two in that mineral and oil drilling interests and royalty interests in oil, gas, and mineral resources are considered to be like kind for investment real estate for purposes of 1031 tax deferred exchanges. 

I'm located in Mineral County, and we are having a rough time.

A friend of mine rents an SFR with a similar description in West Allis at $1400/mo. 

Assuming you are financing this property, you probably cannot borrow at 3.6% or less, which would mean that the return on your invested capital would be less than that (possibly negative)Unless you know something hidden, like they just struck oil nearby and you have the mineral rights, (not trying to be harsh here....but) this deal seems purely speculative.  

@Matthew Paul  who got rich in the California gold rush or the Klondike  it was not the miners it was those selling the pots and pans and of course the saloons  LOLI get quite a few of these weekly probably more than 10 as we have props in areas that wholesalers love to buy in. of course we don't hold anything more than 6 months and we don't need wholesalers help to buy or sell.. but I will on occasion give one a call here is the results.1.

Mineral rights sales.6.

Chances are you'll probably get an experienced miner in this economy and they're used to not getting a paycheck. 20k is too small to do something large and since you have no limit on risk you may as well do something interesting and with significant profit potential.