Electrical Issue

So, I have a 3 car garage at my new place and first thing I thought was grow room! So I did it bought 2x 1000 galaxy select a watt, 12000btu window air, 2 inline fans, 3 wall fans, EVERYTHING I need. I have grown before on smaller level with 1 400 in past, here is my dilemma: The garage is 160 feet away from any power source (I may want to run enough electricity to even expand later since I have the room) but this wire is crazy expensive, sub-panel, things I didn't take into account when setting this thing up (stupid me). I want to know what size wire to run from main box into garage and what size amp sub panel, I have been getting a lot of different answers, I am going to invest a buttload to get this done right and if im going to do it right I want to do it right if that makes sense. Not to mention I don't want to burn the house or garage down Any help would be appreciated.... Any questions you have if needed to help please ask THANKS

If you have the budget, I'd go all out with a 240v 50A circuit. So you'd need:

- minimum 6 gauge, 3 wire plus ground cable to run the length, UF/NMC if you just want to bury it without conduit
- 50A sub breaker panel
- double-pole 50A breaker for your main panel
- what ever breakers you want for inside the new sub panel
- two side-by-side unused breaker spaces in your house main panel

Largest cost by far will be the cable. You can save some money if you have anything you can legally ground to near the garage (it may have a grounding rod nearby already), thereby not having to buy 160' ground wire included. You can probably pick up the cable mentioned for ~$3/ft.

You'll then have tons of Amps to expand in the future, or use for other considerations.

-spek