I was in a large detached shed/garage before moving to my current home and now have a garage gym.
The shed was not insulated and had a concrete slab. Based on my experience with this previous structure I would consider:
Godspeed,
Kevin
Just purchased these handles from Amazon look to be very good quality for the price
Start with this, but the off leash dog issue is a legal issue waiting to happen.
They finally made lever arms for the hulkfit cage!
If your have a smaller budget save up for this, or wait for it to dip in price, or buy Amazon warehouse used. Fitness Reality Squat Rack Power Cage with | Optional Lat Pulldown & Leg Holdown Attachment | Squat and Bench Rack Combos| Super Max 810 XLT | https://smile.amazon.com/dp/B01N4I8FOY/ref=cm_sw_r_cp_api_i_QQ8Y9MC5JEA6EGGNBHRJ
Otherwise get a titan rack. Or REP.
Have you ever used/seen/heard of the Thera Cane Massager? Might not be as good as this thing you got but it works really well without an extra pair of hands and it's $30.
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I use a Black+Decker ceramic heater in my 2 car garage. Here's a link: https://smile.amazon.com/BLACK-DECKER-BHVHC15-Ceramic-Heater/dp/B07JZK58FF/
(looks like a great price on it today too - I paid $80+ for mine)
Works so well I typically have to turn it off halfway through my training.
I got these off of Amazon and they work great. Cheaper than other ones I’ve found. I did get them as a prime day deal. LIONSCOOL Bumper Plates 2’’ in... https://www.amazon.com/dp/B08RJ773KG?ref=ppx_pop_mob_ap_share