I sympathize with the budget concerns and I'm here to tell you B&H and KEH as well as Canon Refurb have all treated me fantastically. Picked up my wife's outstanding RF 24-105 f4L used for $789.98 and despite a significant gouge in the front glass at the periphery it shoots marvelously. We beat our gear up sailing, flying, deploying to the desert etc so I can't justify buying new when the first trip will beat everything down. Any of the reputable used dealers allow full refund returns as well so zero worries.
Before my mirrorless I bought a legendary million pound heavy metal Canon EF 35-350L used from B&H for just over $500 with their lowest quality rating. It arrived missing paint, dented, several mild scratches on the glass but it took amazing pictures all over the world worth $1M to me and I didn't worry a minute about dust, mud or drops. It's completely liberating to have a capable but inexpensive used lens.
For wide angle outdoor and surprisingly useful indoor I enjoy the RF 14-35L f4 folks have mentioned. I've included some pics that are all on an R7 at 14mm or the 35mm end to give you the extremes. I have pictures I like better but they're at 17mm etc and I know you're probably worried about wide on cropped sensor.
* The most fascinating example I dropped in here is the Alaska aurora shot that is at 14mm 6s f4.5 ISO4000 exposure just sitting on the roof of the rental car. I'm sure this lens on a tripod with well thought out settings could do amazing things.
** All pics are handheld
