As a retired firefighter let me weigh in. I'm also in the mortgage process (building) so been through the ringer already.
To answer the question. If applied today I'd say you're in. Maybe not the best of terms, but you're good.
-Things could be better on your end if you waited a year but you say you want this house so lets go from here.
-Good income. Yours especially because its very stable. Lenders like that. Firefighters don't get layed off or downsized. Unless its Detroit. She might have to write a letter on her commissions and how it works.
-Gather up pay stubs, W2s, 1040s last 3 years. They're gonna wanna look at that stuff. I also had to give DNA sample to verify who I was. ( just kidding, but you do feel like your getting a invasive medical exam, but don'td worry about it, they do it to everybody buyin a house these days.)
- do a search here on front end and back end debt ratios. Do NOT do a "back end" search on google, DO it in house on Myfico, if you don't, don't blame us on what ya find. Lenders like to tawk about ratios and numbers. Kinda like how we like to talk about fires,wrecks, and other rescues, we've been too (war stories). "I once got a guy approved with a 51% back end ratio," its what they do. So you need to know what they're talking about. Ask them to figure you're "back end" with the current house payment. This way if home doesn't sell you have a plan b.
-I find it funny the word "back end" is used so much in the mortgage business. LOL
-You will prolly have FHA and conventional loan options. Again search those topics. Short version FHA will float the note with 3.5 down. Take a look at that. If you don't sell you house you're in for about 8k down (230k mortgage). That gives yoiu money to buy stuff associated with a new home. You'll want a new flat screen, and Laz boy with drink cup in the arm for sure in new house.
-Once home sells you can replace the toys you had to sell off. A joker with 10 acres is gonna want a new truck and 4 wheeler at least. Tell the SO you need 4 wheeler to haul firewood and plants around, she doesn't need to know its mostly for riding your buds around the farm and stuff. Might buy a new fire pit so the guys from work can hang out with ya on y'alls off days. So not using ALL your 12 for DP has its good points.
-If you go FHA route, you can come back and refi later.
-the house is listed for 280 but y'all are thinking offering 210?? House been on the market awhile?