Ok.Not the easy solution, but at least is better than nothing (like HDO1K).
Let see if the price will make it an atractive aquisition.
That also gives you option to not pay for AWG in scope in advance if you don't need it.
And if you do need AWG , I would suggest to, instead of buying USB SAG1021I and a scope license, they together cost almost cost the same as buying SDG1032X that is 2 ch fully featured AWG, that also works PnP with the scope for Bode plots (same as SDG2000x/6000x).
I think that is much better deal for few more €.
Of course, some will say that you don't necessarily "need to pay" for AWG license so SAG1021I is much cheaper...
But in the same venue SDG1032X is not SDG1032X but something else....
Basically, if you get SDS1000X HD and you don't have AWG, I would recommend to (if you can afford it, of course ) to go for SDG1032X . You will get BODE plot to as much as AWG support (

) and fully featured 2ch AWG that will let you do so much more stuff. For instance, much larger output amplitude, modulations, sweeps, etc etc...