If I was in your shoes... borrow money (ie bank loan, credit cards etc) - use the mining rigs to pay the monthly installments.
Another thought....
The gain from Bitcoin alone compared to cost of borrowing money is staggering - ie. if you max out a credit card last year and dumped it on BTC, you could have paid off your credit card bill and change many times over.
What would you buy? ASIC? or GPU Rigs?
1070ti or 1080ti?
In my country;
1070ti = 485 USD
1080ti = 727 USD
I have a 'PC' ready to go - it's 12 years old but has 4 PCIE slots. I was thinking of pairing it with 4 * 1080ti and a 750W PSU for another 2,000 sols (6,400 total)
I pay 18c for electricity so I am chasing efficiency - I think the 1070ti make more sense.
If space is not an issue for you, 1070/1070tis are the best. While 1080tis are a beast, the scaling isn't that good in equihash where the large cap coins are.
You can also consider vega56 if they are near MSRP.