If properly mounted , Yes it could be

The model IV is a better built model. You should consider repairing it before replacing with the cheeper built model V.
Their are very few replacment parts for the model V and within a year of the wart. expiring you will have to replace it.

White is currently the only color offered.
The toilet drain size is standard.
It does connect to the RV's pressurized water line for flushing.

Currently white is the only color offered and you will have to measure the available space and compare those measurements to the dimensions listed.

No. This is a replacement permanent toilet for RV's. It would use the on board holding tank.