Greetings!!!

First of all,
I, my family (parent and siblings) we're expecting reasonable sum of money to invest in a business, but then personally at some point got stucked on what to invest in.
Here is the breakdown of some skills I've acquired and hopefully to invest in one or two;
1. Computer maintenance and repairs, network installation.
2. Solar installation
3. CCTV camera installation
4. Intercom installation
5. Music instrument ( instrumentalist)
6. Forex trading

Secondly,
I need your kindful idea on how lucrative is dregging business (sand business). These served as family business.
All proceedings is done and dusted an as the owner of the waterfront, they investors with their dregger are set but are yet to come to the business terms and conditions.
Please with your idea an experience; is it worth dumping millions into it?
What are the possible risk one may likely encounter?
Thanks in anticipation.