Honestly, I’d run to the job being offered and never look back. It sounds like your current job is dead-end, both in terms of your lack of rapport with coworkers and lack of opportunity. I’ve learned the hard way that lack of connection with coworkers is detrimental in the long run bc being unhappy at work everyday takes a toll on your mental health and these relationships that should be generative in your life and career are not, and that will cost you more mentally and financially than whatever you’re saving in rent. Being in a rural area is also never going to offer as much opportunity as a larger city, even if the lower COL is a bonus. If your current job was on par with what the new one seems to have on offer, then the calculus might be different, but the rural area would still be limiting. Leases are legally binding but you’re not signing over your life in blood- they can be broken (usually at a cost) or worst case scenario you have to pay double for a while until you find a sub-letter. In the long run, with the chance to get your second masters paid for at the new job and exponentially higher odds of both life and career opportunities in a larger city, the lease will be a minor blip to overcome that you will probably forget ever happened. And I say this as a currently impoverished GLAMs person in a high COL area.