How many of you are GPU only miners? I have 75 GPUS running for 2 years with 4.2 kwh electricity and the GPUS are consistent making money and paid the themselves off 18 months ago. I'm planning on slowly expanding but I don't see any reason to buy ASICs, the ASICs I've had have been 50/50 profitable. With GPUs they also have high resale value if you want to close up shop and liquidate everything.
What coin have you been mining with 75 GPU's? does all of it mine the same coin or you are distributing it with different coins? you have security with GPU's if you want to sell them if not satisfied, plenty of buyers are still there for their rigs built not for mining and are looking for under the market value but at competitive prices in good condition.
AMD is mining eth or eth classic. Navidia is whatever is the most profitable, right now rvn, rito and xzc.