A conventional storage tank water heater has a life of about 10-15 years, so if your unit is in that age range, it may be worth footing the cost to replace your water heater than constantly fixing regular problems as they arise with age. However, if your water heater is only a few years old, repair may be the way to go.
As well as typical modular homes are placed on land you own. If you meant a mobile or manufactured home then anywhere between $2,000-$3,000 including all permits, set-up, even electric/ac hookups moving around 20 miles distance. This is only an approx number assuming the home is a single-wide. If the home is a double wide OR a number of pop-outs, add-ons, or sun rooms then the price will go up rapidly. Also double-wides never quite go back to the pre-move look and feel, they always seem to be a little off when reconnected.
The base price of $65,388 is the cost of manufacturing the home BEFORE alterations or upgrades are made. ModularHomeowners.com estimates that most home buyers will end up spending an estimated total of around $163,470 which includes shipping, land preparation, and cost of having the home manufactured, set up, and completed. This is only a preliminary estimate and can and will change once more information is provided.