Usually we are in the business of variety, once you commit to just one you might get tired of her sooner. Unless you can afford to see others and it won't break your bank I say go for it, try it for a couple of months.

I only see a few friends each month..
I like the sugar daddy concept..

be honest, talk about expectations and timing and talk about this is a month to month and you and she have the right to move on or go week to week.... 1 month at a time..

Now if you don't want her to see anyone else in general it is a great thing. but both parties have to know all the rules....

Again.. how well do you know her.
does it feel to much like a real relationship and does that kill the thrill?

She likes you and she obviously thinks you are a nice guy who she enjoys.. She does not like taking risk..

be honest with yourself and what is it about seeing her that you like, want and expect..

4 times a month is a lot for me with any provider because I travel too much.  If my travel schedule was different I still wouldn't see most women that often.  But there are one or two who if I set down roots in their area I would jump on that deal.  It all depends on your idea of what you want.

It isn't a unique situation at all for a provider to want such a situation.  It makes their financial situation much more predictable, reduces much of their risk.

there isn't enough information here sweety to really give a

"guestimate". What you have shared isn't a typical sugardaddy arrangement. It only affords you a time slot. That's all. I would be surprised if you didn't have an arguement or two,each month,about availability. If you want me to guess relative to what you have offered here, I would say pass this one up. Some girls will say whatever it takes to aquire that first installment. You might get left high and dry after that.

Now, she could be counting on the fact the guy will get bored of her eventually...OR else she really does want a SD for the relative stability & security it MIGHT have...Maybe she's sick of screening, maybe she's sick of the worry that comes w/ meeting someone new, and the lower bank is worth it to her.
If she's trustworthy, meaning, she won't take the 1k upfront & then disappear, then go for it.
Most SD's I've talked to though...The usually is 2k/month allowance...so I think she's selling herself short. Trust your gut...

Once You Get Into That Arrangement...

...be prepared for her to start having more "scheduling problems" where she can't see you as often.  She will realize that she's already got your money for the month, and that you aren't bringing fresh money with you on your visit and she will get harder to schedule.  As my name states...been there, done that.

If You get unlimited visits...that means You should get...

unlimited time....what's the difference...she gets 5-10 guys to do this...I am sure she Will be Very happy...there are Pros and Cons to this...but I have to say...it's creative and very interesting to say the least