Interest rate woes - Loan quote review requested

[Bernadette Andrews]

I'm doing a 1031 exchange and just went under contract for the purchase of two villas which are under construction in Kingsland, GA.  They should rent for $2100-$2200 and just a few months ago I would've had pretty good cash flow. Now I'm so disgusted by the interest rates and concerned that they could increase even more by the time the properties are completed in November so I'm considering an extended rate lock with a float down option. I wish I could sit on the sidelines but paying the IRS is the last resort. 

Yesterday, I received the quote below with a 6.625% rate including closing cost of almost $13K for the 150 day rate lock  from a loan officer with Guaranteed Rate. Today she texted, "  Rates dipped slightly today to 6.5%, and the Origination fee decreased from $5,831 to $4,900." Please help me determine whether I need to move forward now or shop around for better? Thank you so much BP community.