I'm moving to Wichita next month and am looking to BRRRR multifamilies in the $100-150k range.

I am not sure what areas you have been searching but you most likely will not find anything in that price range that you can easily flip.

I doubt you can move much past 10 deals a year on the side and you need to do volume in order to become good at what you do, understand all the different submarkets, land, condos, price ranges etc 

I’m looking at MFH but the price range seems to put me in a “bad area” of town and most need a lot of work.

Rents in the area for similar units range from $1000-$1200/mo.

Then your choices will be to find alternate lending sources as you've mentioned or finding properties in the range your lenders say.

Is the population growing, are big chains starting to move in if they're not already there, are jobs dependant on a specific employer or is there decent diversity (ex: we have tech and Boeing up here, but tech is starting to move to working from home and Boeing is starting to move some production out of state), whats the median income, where are the bad neighborhoods, etc.

Just from a pure market standpoint, your are going to be hard pressed to find worthwhile duplex/single family homes in your price range from Greater Worcester -> East Mass.

I'm looking to perhaps purchase a new construction SFR (4-5 BR) within the 350-550k range in Charlotte.

I generally recommend the following suburbs of Baltimore for solid rentership: Columbia, Glen Burnie, Towson.So in summary, if you found a househack in the range of 200-350K, I'd expect to have 12-17K saved up for an owner-occupied, first-time home ownership structured deal in the surrounding counties of Greater Baltimore.