You will have no problem with a 3/4-inch hose and a 30-inch lift. As HMS Beagle points out, you have to disconnect it and clean it up and let it dry between uses, and do not leave it connected with sewage.
I have used a macerator since 2005, and rarely use my stinky slinky. They are pricy but worth it in my opinion. I use the FloJet RV Waste Pump Kit. I do not think it is cost effective to modify a 1-1/2 pump. I think the cost of parts and drama exceeds the macerator designed for the RV use.
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