I plan to use either my rental property or a piece of raw land I have paid for as collateral to bring it up to about 100K.

I was going to put $30k cash down, and put up two of my properties as collateral. 

Most work as follows:Rates: 10% to 14% (Most Deals are 12%)Terms: 1 Day - 24 Months (Most Deals are 6 months)Fees: 3-5 points(%) of loan amount (Most Deals are 3 points(%)) - $2500 minimum fee Minimum Loan Amount: $75,000 Max Loan: 65-70% of After Repair Value(ARV) 100% Rehab Financing Available (Most Deals require 10-20% of purchase price down or cross-collateral)Closing Timeframe: 48 Hours - 3 Weeks (Most Deals are 7-10 business days)NO PRIMARY RESIDENCES, NON-OWNER OCCUPIED ONLY, BUSINESS AND COMMERCIAL USE ONLY.

The mortgage company has a contract and collateral with equity.

This willBe my first private lender loan.So there isn’t any collateral or anything likeThat.

If for any reason their loan isn’t paid, they would merely come in, take out their collateral, sell it and get their money back.They file what they call a UCC filing.

That would put me in at 130K and I don't believe there is ANY way to lose on the collateral if it came down to a foreclosure auction.

As an owner, I'd want a significant increase if I had to put up the land as collateral until the building was built, and got paid after/if the permanent financing was secured.

What is a fair rate, down payment, should I offer collateral from my other properties?

Offer property as collateral for the loan.Have you done deals like this before?