The bare minimum you would need to comfortably be at is 650 middle score for your Mortgage scores. That is like the 'good standard' do you know what your middle mortgage score is?
You need to be sure to give time for the whole process it can take up to 3 months or so to get everything done with and finalized I would most definitely pay down the amounts try if you can to get them below 10% if possible 8.9% is ideal and you can do that with all except one reporting the 8.9 if you have multiple needing to be lowered OR you can do collectively 8.9% that will help your score to jump in big chunks in a short amount of time. Also don't apply for anything new and don't until AFTER you are finalized with the home not when you get the approval because you can get the approval and still lose the chance of getting that home if you apply for things or max out cards buying for the home etc so don't hurt your chances once you do get the ball rolling so to speak!
No problem at all best of luck to you I just got my preapproval for my first home the 13th of this month so I know how hard it is and can be! Be sure to have your 4k I believe you said you have in the Savings and DO NOT TOUCH for at least 60 days adding to it is perfectly fine but be sure you don't go below the 4k even if you add it back later you want to show 4k for at least a solid 60 days before your application. The lender will more than likely ask for a bunch of things too so don't freak out. They asked me for most recent 90 days bank statements, my last 2 W-2's, Proof of the DP, Drivers ID, My 401k most recent Statement, and my 2 previous years of Tax Returns. (hope that helps too) 
I was approved for a 250k home with 10k down and a 711 middle score. (not sure how much home you are trying to get and I'm sure different states offer different amounts etc in my state 250k is still rather expensive.
Thank you and Best of Luck to you just be super dedicated for the next 3-6 months and you'll be fine 