How much HELOC should I get?

[Tom Rottler]

Looking for some financing insight. I've got equity in my home and can access up to a $350k HELOC. My idea is to use the HELOC to make cash offers for single family, and up to 4 unit multis, then BRRR. I'll then pay back the HELOC 80-100% with a cash out refinance on a 30 year fixed personal residential loan, then do it again on the next property.

I'm in the final stages of the HELOC but I'm trying to decide between getting the maximum HELOC limit ($350k) with prime + .85% APR or stay with 70% LTV ($250k) and get a better prime - .25% APR. Considering my interest in getting traditional financing on the properties, is it better to have access to a bigger HELOC and more capital up front or keep LTV lower to get better rates and have a better DTI for future refinancing of the investment properties. Any insight experts? Thanks! Tom