Yes, I only plan to have the manual bosworth guzzler 500 pump for dewatering needs.
There was a point in time when I thought of having an electric pump as well (past vessels), but came to the conclusion of keep it simple, keep everything well maintained and sometimes less is more.

I don't see anything wrong with your set up, and honestly it's fairly common. On the other hand, it's not unusual to only see a manual pump installed by the builder, just like it's not uncommon to see no sea cocks on cockpit drain thru hulls, as installed by the builder.

For me, the battery I will be using is very small. Secondly, how long will an electric pump run before the battery charge is insufficient? Thirdly, how to monitor electric pump activity when not on the vessel? Forthly, how to plumb in multiple pumps while still maintaining a clean installation.

A previous owner did have a small rule electric pump installed in this vessel, the install was very poorly done, looked terrible, and so I yanked all of it out, with no intention of re-installing an electric pump.

Every steward of course, has their own idea of the "ideal" set up and that's really what makes our passion for these beautiful boats so interesting. Some where in the emergency dewatering phase of the game a line must be drawn as to critical minimalist, redundancy, back ups, and overkill. For me, I'm choosing minimalist and simplicity.

For what it's worth, Commander #269 (the one I brought down from MD) had nothing other than a manual bilge pump. She didn't even have a plumbed in discharge (thru hull) but instead you yanked out the discharge hose and either placed it over the coaming and toe rail or you dumped it into the cockpit.
A week ago, I visited this vessel I am speaking of, and out of courtesy, cut the locks and dewatered her, pumping for nearly 1-1/2 hours. She had taken on water. Her boot stripe was partically in the water. There was 6 inches of water in the cockpit (scuppers clogged), and worse yet, almost 2 inches of water over the top of the cabin sole! Yes she was sittin "LOW". Just goes to show that not all of our beloved Alberg designs have loving and caring owners. This one obviously has an absentee owner, who self admittingly said he has only used her once in the past two years, so sad. It's hard for me to see a vessel like ours, sit in the water and slowly deteriorate.

Anyways, shes dry now, I hosed out the bilge for him, aired out the cabin for a couple of days, and even replaced a rotten section of bilge hose. Durnig all this, the manual bigle pump worked as designed. My only issue is that the location of the pumping handle can only be manipulated with the starboard cockpit sail locker open! Go figure, what an awkard set up, again as installed by the builder, Pearson Yachts.

At least on "Heritage" the manual pump can be operated sitting comfortable, with all lockers closed and in an up and down motion. So....orientation of a manual pumps installation really does need to be taken into consideration, at least from a stewards perspective, because builders won't necessarily.

Here's anothe shot: