Applying for any home loan will require you to gather a lot of documents. Gathering them and getting pre-approved before you go looking for a home is to your benefit, as it gives you and your realtor negotiating leverage with the seller.
And once you’ve gathered the documents you are not done. After the lenders take a look at the documents they may request additional documents.
In addition, by the time you find your home, the lender may request that you update some of the documents so that they are current.
Be prepared to gather a lot of documents. Sometimes we can reduce the number of documents, but no one can eliminate the need for documents when applying for a home loan so be prepared to gather a lot of documents and then know you will probably be updating a few of them along the way.