Rotation of Fox/Harper/Castle/Barnes/Wemby + Vassell/Sochan/Keldon/Champ + Welsey and Bran deep and 4 roster spots to fill. I know the hate here for Dev/Jeremy/Keldon is strong, but they are very solid 6-8 guys, Champ is a great 9th man. We have $14-15M MLE and the $5Mish Bi-annual exception.
There's not much money to throw around this summer, Wemby/Fox, a clear role, and no state income tax is a pretty solid selling point to take a discount. Barnes + the '22 draft guys and Champ are expirings/RFAs/non-guaranteed. Still have a lot of 2nds.
We have lots of flexibility to upgrade without moving the #14, or to trade down with the #38 to like 17 + 31 with Minny or 19 + 27 with Bkn.
Adams, Lopez, Capela, even Horford (and Kornet) are all UFAs at C. LaRavia, DFS, Yabusele, Nance Jr, Tauren Prince would all fit nicely. Aldama could be a super interesting RFA (JJJ, Edey, GG II coming back, can't pay LaRavia & Aldama + Kennard). Vukcevic got Sarr'd and could be a very cheap, very interesting gamble. Maybe nothing too exciting, but lots of likely cheap, quality bench 4/5s. Point being, cheap quality rotation guys that fit our needs are gettable for cash and we're a situation a backup 4/5 would look at very closely, especially with Barnes and Sochan potentially gone next yr.
Love your first proposal, but would Dallas even listen? That deal doesn't save them money, it takes on 4 yrs of Vassels money without filling a need. It leaves AD/Flagg/Lively as they're only NBA bigs, AD is a glass cannon/Lively may be one too. & They'd still need a starting PG for next yr. Would you trade the #14 plus matching salary (Sochan + Wes, both would fill a need on their team) for just one as an expiring? I'd do it for PJ if he signs a team friendly extension, but not for Gaff.
Likewise would love Camara, great fit, love his game. Ditto love Avdija, but you realizes he's on one of the best contracts ($39.4M for 3yrs and declining yearly) and younger than Camara? No way they trade both, much less take back worse players and more money (don't think the numbers work either). Avdija will cost a ransom. Camara (and his $4.5M/2 yrs) for the #14 is prolly what it would take. #14 seems high, but he's young and cheap and there are a lot of teams that'd be interested. I'd consider that, but that's steep.
I'd rather roll the dice, ideally trade down, keep building the stockpile for the perfect fit, get some stop-gaps role players (or throw money at Aldama, he would be an awesome fit and he younger than Camara) and see if Fleming is Naz 2.0 with better mobility plus a Wolf or Raynaud or Sorber. Or use the extra pick + 2nds and redemption expirings (Sochan/Wes/Bran) to trade for John Collins (but not sure Utah would value the #27 or #31 and he's an expiring and he's a quality player).