I'm not sure what your financing strategy is for your early phases, but it will save you time and money in the long run if you're familiar with all your options now.

Save it for when something breaks or is vacant? 

Being great at this will save you from losing lots of money.4.

And I Only have about $3000 saved up and was wondering what anyone thought about an early withdrawal from my 401k to get started.

I don't think there was any malicious intent here, but it seems reasonable to me that it should be up to him to honour what he said rather than me paying for his mistake.I want to resolve this ASAP because I want the house to be ready for October because otherwise I will lose October rent, and also the rental market will cool down and will be harder to find a tenant at the price I want.

It’s saved me time & money on my house search.

The remaining 10% I have in cash sitting in an online savings account.  

But...If I wanted to engage in other REI deals with money straight from my savings account, would I have to form a separate business entity in order to take part?

You can save yourself lots of headaches if you buy this with another kind of financing other than hard money.

Additionally, Lowe's allowed me to use their 10% moving coupon on the purchase and I saved another +$200.