You can just deny the application due to incomplete information.

if tenant lied about anything, you should be in the clear to deny him.if there is some material thing that you found, but tenant did not lie you are likely in a difficult decision. turning him away would probably be viewed as breach of contract. however, I would much rather be in breach of contract for denying him entry, than to let a bad tenant move in who may destroy my property or not pay rent. the choice is yours and will depend on what you found out about him. perhaps if you tell us  more details we can be of better help.no legal advice given. pursue at your own caution.

When I finally found one that said that they do them for investors, they denied me AFTER pulling my credit and having me go through rounds of paperwork.

@Brian Adzadi I am not denying that I am probably at fault.

I got denied by all the major banks at your age, but found out that credit card companies had much different standards than banks. use this to build credit first. your score is determined by many things including % utilization, length of time accounts are open, on time payments etc. many credit card companies will give you a credit monitoring option from your account. it will go in more detail. your first step is open that new account, and pay it off in full every month. then every year or so, ask for an increase. the higher your limit, the lower your % utilization which increases your score.if you cannot get a traditional card, then a secured card is your next best option

I'm trying to get involved in buying rental homes for cashflow, but I'm pretty confident I would be denied, but I'm assuming she might not be.Would we be able to co-sign on a loan?

Locals have denied that via commissioners. 

HOWEVER, if the repairs are not done with the correct fasteners your insurance company may deny any claims you make.You indicated that the roof was 100 years old.

I don to know the specifics, because knock on wood it hasn’t happened in any of our properties, but in Texas there are some rights granted for a tenant to break a lease due to domestic abuse.

I always wondered if they ask for a " pet " in writing first , and you deny them .