depends on where you are and whats lacking. maybe it can be a home-based business site, or an accessory dwelling unit, or a mini-warehouse for ecommerce, or a recording studio, or a wasabi farm, or breeding domesticated foxes. is this an expense or an investment?
if you can relatively afford it and the extra space would add a lot to your life then go for it. if its a hardship to pay for it and/or the extra space is just extra then don’t. loans are likely hard to come by for undeveloped land in normal years and able to be almost impossible soon.
monoprice.com is a good source for inexpensive high quality tv wall mount brackets. you’ll also end up wanting to hide the cords in the wall soon enough.