IMHO, the only wifi solution I'd recommend is stuff from UniFi. It can be somewhat cumbersome to set up for home use, but the price and product quality is hard to beat!

What type of wifi router do you have at home? How far is it from your garage? You might be able to simply move your existing router closer to the garage.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.