Most front load units can stack, and some brands make the unitized or 1 piece units. I would look at a unitized set for the price point, and GE makes a good one. Here are two options. 1 is GE 1 piece for budget, and the other is an LG front load for budget and quality.

1. GE https://www.geappliances.com/appliance/GE-Unitized-Spacemaker-3-8-cu-ft-Capacity-Washer-with-Stainless-Steel-Basket-and-5-9-cu-ft-Capacity-Gas-Dryer-GUD27GSSMWW?_ga=2.194989421.1722631795.1638629783-1530295521.1598560311

2. LG https://www.lg.com/us/washers/lg-wm3600hwa-front-load-washer

Run a cycle or two of bleach for the tub and inner boots. Run Affresh washer cleaning every other week and wipe the door gasket with Clorox a few times. The mildew generally will collect on the rubber components. Weekly or bi-monthly maintenance will go a long way in keeping the washer fresh and smelling good for many years.

They are almost one and the same. Most ranges today have a mode for either. Air fry is almost a fancy name for convection. The main difference is the air fry mode. The fan spins much faster to superheat the cavity. Air fry ranges also use a perforated type tray to insure maximum airflow allowing the food to cook from all sides faster. Both will brown and crisp, but air fry will give you better results. The algorithm in the cooking modes is also slightly different, I have used both modes and air fry seems to crisp the items faster.

most top loaders today have that issue, a front loader or horizontal axis machine wont but a top load on a high spin centrifugal force will end up pushing the bedding to the outer edge of the tub and bunching up. Try a lower spin speed and make sure you place it in as evenly as possibly because they retain a lot of water then cause the tub to shift around. Some newer LG models have an auto balance feature that works well. It will stop mid cycle spin back and forth to try and re-balance the load.,