If you are going to be depending on financing get a pre-approval letter.  

If you are going to use financing it is useful to have a pre-approval letter to submit with your offers.  

Get a pre-approval letter to submit with your offers.  

Look at TILA, residential consumer loans require APR disclosures, when you have an APR requirement you won't see a PPP, can't factor that in and if you did take the worst case, payoff at one year with the maximum penalty your APR could be so high the loan would be predatory or high risk. 

Get a pre-approval loan letter to put in your offers.  

If financing is playing a role remember to get a pre-approval letter from a bank and include a copy of it with your offers.  

If you are going to finance it is a good thing to get a pre-approval loan letter to put a copy in with your offers.  

It's really important that you get a Pre Qual that has DU ( desktop Underwriter )or LP ( Loan Prospector )  attached to it so that you know your solid qualifying for your purchase.  

In the mean time, should I try to seek out a pre approved loan some where?

The only difference is that the APR will be a little higher than the rates you're seeing advertised for home loans because it's an investment property.I've found that mortgage fees and rates are negotiable.