@Emily Thompson If you want to turn the Mobile Home yourself it would most likely work best if you put filp deal in place before you make your purchase. That way you can pay for the deal and then get paid the same day. You should be able to set up the closing to do it all at once. It will take some planning but can be done.
As far as having an income property you are correct, if you sell the mobile home then until you put something back on it you have cash for the sale of the Mobile Home and an empty lot. So if you are buying the lot to make money and not for your personal use here are some other suggestions.
1. Keep the home on the land and rent it. Of course, this one has been covered already and some good suggestions have been made on how to go about that.
2. Keep the home on the land and Air B&B it. If it's on the Lake and it's a nice place then make it into a vacation destination. This could also lead to better ROI if you want to do the extra work or pay someone to manage it for you (less ROI but still an option).
3. Take the $ from the sale of the Mobile Home and put another building on the property. Home, duplex, tiny home, a few RV's (if the community lets you use this option), Shipping Containers, or purpose-built storage units. or put gravel down and fence it and use it as an open but fenced RV/Boat storage area.
4. Flip the land for a profit. It may be that the land will be worth more without the mobile home on it (Some people can't see past the mobile home issue so they don't value the land as much).
5. If it has water access build a dock and rent dock spaces to people who don't have direct water access.
If I think of any more I will let you know :D
James