This is a powerful tactic, but it does have limitations. There are a number of counters to it.

• To begin with, it breaks down in environments where sight lines are limited, and enemies don't need to chase the rogue down. If the rogue needs to get past the monsters, and the monsters have cover available, the tactic fails.

• While the rogue can kite effectively, other members of the party may not be able to. Opponents can focus their attacks on less agile opponents. If they can drop one, they force the rogue to approach, or allow their comrade to bleed out.

• Stealth and other means of closing the starting encounter distance will counter this tactic. Once in melee, a foe can use the dash action to stay next to the rogue and opportunity attack when the rogue moves away.

• There are a number of spells that root or slow down opponents.

• While many antagonists have a move of 30, there are plenty that move faster. Dragons are notorious for this.

• While it is possible for a rogue with a long range attack to use this tactic against other ranged attackers, it requires a much greater encounter distance, and makes the counters above easier to execute.

Yes, you can use a bonus action then

You answered your own question :) That ruling on bonus action states that you choose when to use your bonus action unless that bonus action has other riders (like GWM allowing another attack if crit or reducing the enemy to 0 HP...meaning you can't take that bonus attack until that circumstance occurs.)

You are completely free to take your bonus action Hide at any point in your turn.

(However, you will still need to make the stealth check to hide - which may be at a penalty since the target may have seen you go to cover after striking.)