Designer wanted for retirement gift: quote stickers + A3 poster

A colleague is retiring and over the years he has accumulated a collection of catchphrases and one-liners that everyone associates with him. I'd like to turn these into a fun typographic sticker collection, and use the same artwork to make an A3 poster as a retirement gift.

There are 15 short slogans. I would like you to develop these so that they have visual consistency but are different enough from each other, being fun and playful. I would like to get these printed as sheets of stickers, the kind of size that could be stuck on the back of a laptop. I also want the complete collection to be on an A3 design that we can frame as a separate gift. The design should not be slick, corporate branding, but rather slightly irreverent and affectionate.

I'm looking for:

1. One A3 poster design: Print-ready PDF, ideally CMYK, 300dpi/vector artwork and bleed.

2. One sticker-sheet design: A4. I'm not sure whether all 15 stickers would fit on one sheet or whether they would need to be split across two sheets, depending on overall size, and would appreciate your advice.

3. The individual sticker artwork: SVG/PDF or high-resolution transparent PNGs, so I can reuse/reprint them.

4. Editable/source artwork: Illustrator, Affinity Designer or equivalent.

5. One or two rounds of minor amendments.

The slogans will be shared separately. I've used AI to create some proof of concept materials which I will also share, but they are far from something of the quality that I would like to hand over to him.