I'm interested in investing in SMBs, either directly as part of searcher's fundraising or through a search fund.

For those of you who have been active as investors in the search space, I was curious to learn about a few things:

1) How did you come across the opportunity to invest? By networking with searchers?
2) What's the typical size of investments you've made? Or what's typically the minimum requested by searchers? Obviously depends on the size/nature of the deal, but wanted to get a sense of range. $50K? $100K?
3) If you've made a few investments, did you set up a LLC or other entity structure for tax purposes? (so you can run investment related expenses through them?)
4) For those of you who've invested in Canadian deals from the US, did it present additional complexities/challenges beyond the obvious FX risk? (e.g., tax complexities, difficulty in moving the money, etc).

Thanks!