9.13 years (or 3334 days) to break even assuming that the network hashrate doesn't change. Odds to solo mine a block with 1.5 TH/s vs the network's hashrate of 635.26 EH/s is approximately 8,052 years
Discussion
I forgot to add, the above is assuming that you can run the miner for free
Uh, yeah. Home mining isn't for profits. I think it should be considered to be like running a node. It aids decentralising slightly.
The upside is you get a few non-KYC sats if you join a pool. Or you have a non-zero chance of finding a block with CKPool.
An S19 space heater gives you 40 times the hashrate at 1000 watts, makes sense if you needed the heat anyway, and it can be plugged into a normal wall outlet.
https://d-central.tech/product-category/bitcoin-mining-heaters/