Starting a campground is another speculative, expensive, time-consuming, and risky business that requires 14/7 management and most existing campgrounds are nearly empty since starting about 30 years ago when kids started getting all the new electronic games and other crap a high percent of families don't go to the forests and campground like they used to.Your ideas have too many 'IFS' and to many risks.

@Mame Thierno Seye,The best, easiest and cheapest way to get into the game is by buying a primary residence (ideally a multi-family!). 

I brought about $10k to the game and to be able to effectively market for business I should have brought at least $25k. 

Like @Joe Splitrock said, the professional investors are staying in the game because they know how to navigate the nonsense and continue to turn a profit. 

Of course, banks are going to want you to have 20-25% skin in the game, which is only fair.

Short-term rentals are a huge part of the game today n major tourist capitals, sure, but that doesn't mean the game has really changed all that much.

Here's why:Let's say I sign a tenant to a one-year lease, and 3 months in, their personal/professional situation changes, and they break their lease and move out after a 30-day notice (or maybe less).I am required, by law in most areas, to "mitigate my loss" by remarketing the unit, making it rent-ready, and starting up my lead generation machine to get applicants, funnel them into my screening system, identifying good candidates and ultimately leasing them up.

Well all the bug finally bit me and I'm now in the real estate game.

Being a recent college graduate and I am in the process of getting hired for a job right now and plan on going straight into the real estate game once I have capital. 

Call them up, and ask them how long they are planning to play this game.