I might disagree slightly, and say this depends. And here's why:
1) Some people have VERY deep pockets/income/etc. Some of these partners could sign on millions of dollars in loans, without huge ownership distributions, and still provide a lot of support - especially if the CRE deals are strong. Partially because...
2) If the strong partner guarantees the deal rather than signs directly, it is a contingent liability rather than direct liability. It is often-times not directly underwritten as debt as long as the deal is paying for itself.. Especially if the guarantor is very strong, has CF, liquidity, NW, etc..
3) With strong enough guarantor(s), you may be able to get a non-recourse loan for another 25-50bp. This avoids the debt going on anyone's credit. Ironically, you need a very strong partner for the Bank to have enough confidence to not make any natural person sign.. But experience will probably be important to them too.. With this strategy, you can finance as much as you can put downpayments on, although they might want 25-30% down for non-recourse.