Hello,
You've gotten lots of great feedback. Just thought to share my two cents. You can literally get away with a box cutter, dinner fork, awl and needle with thread. You will definitely produce some 'bushy' projects. My recommendation is get one of the cheap kits for under $100 that comes with all the basics and then some. You will have what you need to get started and in time be able to determine what you use regularly and need to upgrade. Some of the tools from the kit will last years. Once you determine what you like building, the need for upgraded, specific tools, will make themselves apparent. Working off your bike, you will have to keep it relatively simple. Toting a slab of marble around for tooling, probably isn't an option.
Hope this different approach will offer some ideas.
Knees in the breeze,
Maurice