Choptalk:
Let's assume a house for $97K just for example purposes. You offer $100K and ask the seller to pay $3K in closing costs and prepaids. This allows you to borrow more ane bring less to the table.
If you do a first mortgage of 80% of the purchase price or less then you don't have to pay private mortgage insurance. So you will take out a first mortgage of $80K. This could be a variety of products, a 30 year fixed rate mortgage is the most conservative and has the highest rate and your rate will always be the same. Other good options would be a 5/1 adjustable rate mortgage (fixed for 5 years and then goes up or down every year for the next 25 year, gets you lower payments for the first five years and if you only live in the property 5 years or less you are ahead, if you live there longer you may start giving some of those savings back but it will also be in tommorrows dollars). Also within the first mortgage is an interest only option. Carries a slightly higher rate but a lower payment option if that is important. Each month you can pay the interest only on the loan. Usually you can do this for 10 years and then you have the next 20 years to pay off the loan. This is a good option if you want the payment lower. You can always pay additional each month you just are not required to do so. Example $80000 30 year fixed rate loan with principal and interest at 6% would have a payment of $480 a month. An interest only loan at 6.25% has a payment of interest only of $417 a month (which basically just services the debt, if you pay $417 for 10 years you still owe $80,000). Just depends what is most important. I would recommend staying away from loans with a negative amoritzation and give you a payment lower than $417, they are not good products for most people.
Next you would follow it up with some sort of second mortgage for 15K. This could be in the form of a home equty line of credit (HELOC) which is usually tied to prime and the interest rate goes up or down every month with prime. Prime is currently 7.25%. This is like a big credit card which can be paid off and borrowed against. This option would work good with the interest only option above, and if you want to make extra principal payment you could make it on the heloc. The other option is just a fixed rate second. This will probably be at a rate higher than the heloc.
One other way to go is do one loan for $95K and have private mortgage insurance. I would only recommend this if you were planning to fix a property up right away and add square footage so you could get rid of the private mortgage insurance in a relatively short period of time. Interest is tax deductible and private mortgage insurance is not. The FHA loan has private mortgage insurance on it and plus and upfront fee on private mortgage insurance that is why you should avoid that loan.
If you have mattress money, you want to get it into the bank right away to avoid what is called seasoning of your funds. Investors don't look kindly to cash, another thing is gift money from parents, easier to get it now and put it into the bank and avoid the whole gift rules.
Hopefully this helps if I had more specifics I could help you more.
Let me know if you are looking to offer on a house and what you are thinking and I can tell you what rates look like and how to get a better interest rate.
Northern Star