How fast your credit score reacts to the changes you make depends on what is influencing your credit score down but most often if it is not negative credit then it's your credit card balances are maxed out or close to being maxed out.  

also be very careful of advanced fee schemes that are rampant on the internet and here on BP you may get a PM  hey howzit  you looking for a loan then back and forth then your approved magically all U need is to send them 500 to 1500 bucks to do the docs and the money has to be in gift cards or some silly thing like that.. 

Art, metals, property, hell even collectible old baseball cards. 

Aside from that, most people starting out will use some/all of the following to fund rehabs:- friends/family- side hustle- credit cards- home equity line on current residence- personal loan at bank- ETC

But I thought next year the tax form was going to be the size of a post card?? 

QBO is able to set up recurring payments with card or ACH transfer.

I used credit cards and personal loans to finance the cost of repairs.

Don’t start stoopid and forget to change your drivers license, bank address, put all the utilities in your name, lie to the county property tax collectors, make sure your renters are willing to lie for you to, and never piss them off since they could blackmail you, make sure you declare rent for your current property unless you sell it, since it’s not your residence anymore, change your address with the irs and your employer, and your credit cards and the credit agencies, voter registration, that should cover most of it. 

If it's just non-existent, you can get a credit card and start using it for monthly purchases such as food and gas.

I am suggesting that simply claiming to be a contractor, in TX, means nothing more than they have a business card.