Value-Add Deals - When to issue a capital call vs other techniques?

Hey everyone,

The family office I work for does small value-add MF deals (as the GP), but they currently ask for all required equity upfront (including a capital reserve), even though some of the equity won't be put to use until Y1 or Y2 (or never at all if the capital reserve is too large), effectively lowering our promote. If we switched to a capital call structure, are there flexible financing facilities that would allow us to pay for multiple small costs, i.e. not having to annoy the LPs with multiple small capital calls? I know larger REPE firms and REITS have access to revolving credit facilities, are there similar facilities for smaller buyers? How are you guys solving this problem?

I'm trying to get a better understanding of when to ask for/distribute capital to better maximize our returns, so any thoughts on the matter would be appreciated.