My situation:I have approximately 30k in startup funds at this time.

You will need to have enough cash to not be reliant on proceeds from Sale #2 to fund your purchase, and it will add a $1500-2K to your transaction costs. 

I also do not yet have the cash on hand to purchase and fund my own deals so me and my husband were happy to make our lender money in the process.How did you find this deal and how did you negotiate it?

These are the numbers from the mortgage company:Closing Costs: $8,679.11 (half of this is lender points for a lower interest rate)Prepaid/Escrows: $2,211.79Payoff: $130,189 (this is the loan I took out to purchase the home initially before renovating, I put down $23,025 which was 15%)Total funds to Close: $141,079.90Loan amount (75% LTV based on $240,000 appraisal): $180,000Total Due at closing: $38,920.10Help!

Looking back, may have just kept the wall units but central air seems to be a big draw for the renters.Future: Am looking into getting a HELOC on property to fund the next multifamily investment.

Considering creating a self directed solo 401K for my wife and curious if there are options where I can utilize the funds for rehabbing my own REI properties?

I’ve been hearing about self directed IRAs (Roth/Traditional) and 401ks being used to fund deals frequently.

6% is a little high....but without anyone knowing your debt to income ratio, your credit score, whether it is a multi or single, what your ltv on the loan is, its impossible to say. 25% down with a low dti and high credit score is going to be about 5.5% right now. 

You will need to have some funding though, as they prefer you to have skin in the game.

An empty building can be great for a buyer, funding will be a different story however.