perhaps "increasing application rates, and ideally funding rates, particularly among repetitively flooded households..."
maybe "expanding funding, coupled with efforts to increase application rates among repetitively flooded households, could yield significant long-term risk reduction benefits" ?
trying to get at:
1) don't think we want to imply that every flooded property should get federal funds to mitigate
2) also don't want to imply that we should just have lower funding rates
3) i think "there are opportunities to expand cost-effective mitigation investments" is a more productive framing than "how to expand access" though i agree that the subtle implication of the latter is that the selection process (e.g. cost-benefit ratio) is not actually a huge program for marginalized households, at least not in our data.