Dual water heater in mountain cabin
I have a 3700sf cabin in Big Bear, CA that is a vacation rental. I currently have a 50gal gas water heater and a few guests have run out of hot water mainly due to the use of bathtubs. There are 3 bathrooms consisting on 2 showers, 1 shower/tub combo, and 1 jetted tub.
The problem is the cabin normally has 12-14 guests. My plan was to add another 50gal gas water heater in series. I checked into tankless and it is still not cost effective.
Is this the best solution for my problem?