I'm using Roofstock to make my first investment purchase and am currently under contract.

Unless you purchase at least 95% of the value of your list.My recommendation is always to get the new property under contract during the 45 days after the sale or in the short period before the sale happens (you can go into contract for your replacement property prior to sale. 

Thanks, I already know that part but how do you get inside the house itself, for example let’s say I have the house under contract but the seller lives out of state.

I'm actually under contract on my first investment with Roofstock and so far the process has been pretty smooth. 

I have had a deal under contract for the past month. 

I went to my local website to find the owner but it seems to be absentee owners. and do I still try to get foreclosure homes under contract for wholesaling or no. im currently on info over load.

You can make higher rents for each door, but obviously adds an additional hassle with more individual tenants/contracts. 

We have had many, many good stories with Yellow Letters and have placed many houses under contract directly from our mailing campaigns.

Get the deal done, do an inspection with estimates, adjust the contract. 

The best way to mitigate the 45 day issue is to shop early shop hard and get into contract as soon as you can.