Please advice.

I am interesting to Lending for business?

It is expensive or not if Lending bitcoin

How to get cheap interest?

and about about RISK for payback?
example 1 bitcoin value 60,972.20 if I rend 1 bitcoin and next 6 month value high to 120,972.20 double?
have any option to fix price payback return like  value rent is $10000 USD (0.16 bitcoin) if price up I still payback for  $10000 USD (0.082 bitcoin)
What is best way to rent contract?

rent still need to convert to local currency or USD.

What plate form recommend me to use?

I do for real estate business.