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The best time to transplant is in the spring, but if your neighbor needs to clear them out, you can do it now. Take as much soil as you can, transplant quickly and water well. You may find the following article helpful: https://www.gardeningknowhow.com/ornamental/flowers/hollyhock/tips-on-hollyhocks-growing-hollyhocks-successfully.htm

Hollyhocks are prone to powdery mildew and other fungus. Treat them with a fungicide. This should help prevent the yellowing on the leaves.

As a precaution, I would also check watering for the plants. If they are not getting enough water, this can also cause yellowing.

Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/hollyhock/tips-on-hollyhocks-growing-hollyhocks-successfully.htm

As for the lilies, do not cut the plants. Allow the leaves to die down naturally so they will have enough energy for next year's blooms.

Rust will typically attack the lower leaves but it may spread to more upper leaves. Here is more information on rust: https://www.gardeningknowhow.com/plant-problems/disease/learn-about-plant-rust-disease-and-rust-treatment.htm

Thank you for sending us your question. The following article(s) should be of some help to you: https://www.gardeningknowhow.com/ornamental/flowers/hollyhock/tips-on-hollyhocks-growing-hollyhocks-successfully.htm

"A Garden for Cutting" by Margaret Parke states: "Certain plants require an extra step. The cut stems of poppies, hollyhocks, hibiscus, and oleander, for instance, ooze a milky or yellowish latex. If the ends of the stems are untreated, this sap will coagulate and clog the stem's water-conducting tubes. To prevent this, make a few slits in the stem end and sear it for about half a minute over a candle or gas flame, or dip it into a few inches of boiling water for about a minute. Take care to apply heat only briefly lest too many of the water conducting cells be damaged in the process. Finish conditioning in a deep, water-filled container."

Cut hollyhocks when the bottom third of the florets have opened. Once the stem is cut, more florets will open; the entire stem should last ten days."