RobertH,
in either HP case, if the boats were propped as twins typically are for any HP, if the boat can plane on one as mine does (eventually), what do you intend to do once it plans ?
In either HP case, when it plans, you will be well below min WOT even with throttle buried in console. The motor temp in time (how long ? - don't know) will rise and overheat and self destruct or auto cut back RPMs to save itself (if it has feature). Overheat alarm will be sounding. I would care not to overheat motor, but others may not.
So, IMHO, If you want to run on one motor at planning speed, you have to reprop when you want to do it, or pick props for both so the motors are way underpropped. Option two will give you space shuttle acceleration but poor poor fuel economy and less speed, option one may mean going over side to change prop, not so easy even in calm seas. If you can get to a beach with no waves then very doable.
The other choice is to overpower boat, not one of your options listed, but entirely feasible, and with one set of props.
If what I wrote matters to you, then you may want to to verify it.
Especially with consideration in whatever sea conditions, people on board, and loading conditions, it will be done.
Good luck.
.