I've already gotten pre approved and the process of reviewing properties.  

Track all you do and review it regularly and see where you might cut your expenses gain your income.Always do your math analysis and try to look at your prospective properties before you make an offer or at least put a clause in the sales contract (for about 10 to15 days) without a penalty that will hurt you too much.  

A cash purchase doesn't speed up the process at all, the lender just verifies the buyer has cash/pre approval to begin the review process.  

@Jem Jacala use this guide as there is a lot of useful information here:https://www.biggerpockets.com/renewsblog/2013/01/2...Don't just focus on the score as you want to review the history, late payments, number of lines open, etc.

For real estate contract review and transactions Reinhard Stephan is very knowledgeable.

., so I can review to see if it fits their needs.  

Some places can process the order same-day, other places take a business day or two.Underwriter needs to review all of the above, issue clear to close, and allow docs to be sent to title. 

As a newbie investor it is always great to get unbiased advise.  

On the flip side, realize that an occasional bad review can simply be the result of someone's personal inexperience, or a personal vendetta. 

There is a systematic approach to limit losses upfront reviewing a property before you travel to tour the site in person etc.Lenders like to push ordering of reports right away to move the loan forward but until condition of the property is evaluated with the numbers and validated spending thousands to tens of thousands for reports on a property doesn't make sense.