When it comes to pendulums, if you are worried about your own interference, I see many people just make a jar to hang them in and maybe place a chart underneath for more complicated answers. I would stick to yes and no and being specific in who you are asking, whether it be your Higher Self, the Universe, a specific spirit (please take caution and specify the spirit you are speaking to, since you want to make sure you have the right one. I recommend asking questions only that spirit would know after asking it to show yes and no.)
I have a money bowl as well! a bed of rice and salt with green candles works wonders <3 and I find that I contribute change to it, but also take change when I need it (for the bus, or tight situations!) I also blow cinnamon in my door on the 1st of every month to welcome prosperity and abundance into my home <3 just remember to program your herbs!
I used to have a big green sachet of crystals since I primarily worked with them and tarot for my first 2 years. I used to take Tigers eye for focus, sodalite for anxiety (which is why I connect to it on so many levels!), onyx and black tourmaline for protection among others, and of course clear quartz to amplify and a ball of selenite to charge them. The sachet became harder to carry around though, so I now just stick with either wearing jewelry or putting some in my purse or pockets. (sodalite, howlite, fluorite, amethyst, rose quartz are some I use.) I also make crystal jewelry!
My absolute favorite crystal (besides sodalite and amethyst oops) would be mahogany obsidian. It reminds me of when you accidentally bleach a part of your black shirt in the laundry lol (which Ive done so many times! Dx) but I think it is absolutely beautiful.
Ahaha, yes a greenhouse sounds lile a wonderful idea! ^^ Myself and my partner are growing all of our own food and I plan on having a little garden for flowers and then one for herbs. Let me know if you need any help growing herbs or flowers! <3