I would recommend to buy ASICs as cheap as possible and overclock them in 2-phase immersion cooling system https://www.thecooltank.com. Immersion cooling system ensures optimal ASICs temperature to extend life before repair.
For example:
1) Buy Antminer S17 Pro (50TH, 1975W) - 10 units 2) Buy CoolTank 2.0 - 1 unit 3) Prepare ASICs for immersion: >insert hashing boards and control board in cassette >insert PSU in pockets outside tank 4) Install immersion firmware (provided Mskminer, Braiins, Vnish) 5) Use "High power" mode to overclock ASICs by 40%
S17 Pro x 10 units x 40% (overclock) = 700TH (200TH surplus)
Use any profit calculations to estimate your profits: 700TH 27650 Watts