You can use the lokworx+ or 4151 adhesive. One pail should cover 1,000-1,200/sq ft. More on reddit.com

You need to have a clean slab. All of that glue needs to be removed before using a system like that. Should have adhered. Though Shaw will tell you to remove that existing adhesive no matter what More on reddit.com

Who are the manufacturers and what are the style numbers? More on reddit.com

Eh, okay. So, everyone here has some really good suggestions for durability, etc. u/K0rby , you're 100% right with what you say. But, I'll offer a different perspective - u/Sivart67 didn't give us too much info on the purpose here. If you're going to have a 5-year tenant in a building, then just put in the cheap carpet and be done with it. You're probably going to have to replace it in five years again anyways. Yes, the carpet tile - it may be made to last and then you might *not* need to replace it? But that's a bit of a gamble, and the OP seemed to be asking about the cheapest option. As for timelines and supply, etc - surprisingly enough, we've looked at using Home Depot in the past with their carpet and installation options. Sometimes they were the cheapest by far. In the old days, I've even gotten my flatbed trailer and gone to the local Home Depot and gotten rolls of carpet that I installed by myself in one evening. It's not that difficult (use the mastic tape - works wonders but don't accidentally get that stuff stuck to your face!). Installing carpet is pretty easy and straightforward and hands down the way cheapest option. Hope this helps... More on reddit.com