A and B own Fantasy Farm as joint tenants. They rent the property on a short-term basis to guests who want to experience living on a farm.

A also lives on the Farm. B does not.

All of the maintenance of the farm and oversight of the guests, however, are provided by employees. A doesn't contribute to any work for the Fantasy Farm business, except that A collects the fees that the guests pay to stay at the farm, splitting the net proceeds with B.

When the well-water system that provides drinking water and irrigation for the farm was damaged during a storm, A paid to have it repaired. A has also paid the annual property taxes for the three years that A and B have owned Fantasy Farm without asking B to contribute. The three years of taxes totaled $18,000.

A requested that B contribute of the cost of repairing the well-water system. B refused, replying "you should be paying me rent. Because you live there, we lose $20,000 in revenue from potential guests. Paying that repair cost is the least you can do."

Angered by B's letter, A withholds the entire $12,000 in fees paid by guests for the month of September.

What claims, if any, may A file against B to recover (1) the cost of fixing the well-water system, and (2) the taxes that A paid for Fantasy Farm?

What claims, if any, may B file against A for A's failure to pay B (1) rent for A's use of Fantasy Farm as a residence; and (2) a share of fees collected from guests for the month of September.