I'm a bit concerned about the bar spacing on your floor. It is recommended to have a 1/4" x 1/4" maximum bar spacing for a chinchilla. This prevents their feet from slipping through the bars which can result in fractures since they have such long back feet. In your situation many owners use a fleece floor liner. You may want to research that and cover the floor with it.
My customized cage has a section of wire floor where my chinchilla can pee through and the rest is solid. It works very well but it is difficult to build. Fleece has its own problems though. For you you'll have to weigh the risks and benefits of each case.
Chinchillas typically spend most of their time on solid shelving, which should be made of wood. Shelves can be easily built for a cage. All you need is a saw, a tape measure, a drill, and some mounting hardware. I recommend that you build some or get help from someone who can and research how it is done. It is very simple.
Plastic cage items are not recommended. Plastic that is chewed may become ingested and cause a fatal bowel obstruction and shelves are something chinchillas tend to chew the most.
Typically chins don't use ramps. They can jump over 6 feet straight up. You may want to leave them in until you can fix your floor though to prevent her from gaining enough momentum to cause a fracture.
Wire flooring is actually standard practice with chinchillas. As long as they have a solid surface to rest on it is rarely ever a problem. If the floor bar spacing is too wide there is a high risk of injury. Foot problems tend to be caused by (in this order) dry cracked skin from exposure to artificial bedding that is super-absorbent, improper bedding that is not absorbent enough resulting in exposure to urine, unknown causes of skin dryness perhaps related to aging and genetics, trauma from accidents or fights with other chinchillas, and fractures from wire shelves or ramps. Exposure to wire floor can cause sores but is rare and caused when the animal does not prefer to use the shelving.