AG,
Welcome aboard. There will be CRT'ers around during the first week of Feb for Superbowl weekend. We usually fly in on Thursday or Friday and then leave after the SB on Mon, Tue or Wed.
I'd recommend 7 days for your first time, 10 is just too much. I did 10 days/9 nights my first trip. After 7 days, I was bored. I was
forced to do tourist crap (canopy, ATV's, rain forest, etc) just because I was sick of phucking. Yes, you heard that right. I was burnt-out.
Travelling solo... a lot of guys go solo. You can meet CRT's down there. SB week, there will be plenty of available wingmen. Join VIP, you'll get discounts in many businesses from sessions to food. I would recommend getting around town with a wingman, even during the day. It's relatively safe, but I'm cautious and safety in numbers. Taxis everywhere at night,
NO walking around at night.
Budget... depends how deep your pockets are, your preferences (massage parlor or Del Rey), etc. Air s/b around $500 and hotels can vary from $15 to $150, but let's say 60/night ($420 for 7 nights), exit tax $26, taxis from SJO to hotel $20, taxi back $20... That's a $1000.
Now for the good stuff. You gotta plan $100/session at DR these days. How's your Español You can sometimes negotiate less. MP's average $40. One of each daily is $140 x7 = another $1000.
Don't forget to eat and drink. Figure $50/day for food and drinks (non-alcohol). And then there's the booze. You may take a trip to a strip club, so figure at least a hundred there.
Don't believe everything you read. When guys say they had 5 chicas per day, most do not have 5 separate sessions where they C*m each time. They may do a threesome or foursome and count that as 2 and 3 girls, respectively. Plus, they don't always C*m in each session. Don't get me wrong, some guys can pull off 5 shots a day, but despite what they claim, most can't.
$3000 (really $2000 without air/hotel) sounds good for 7 days. The figures I gave you were over estimates, you probably won't spend as much.
Read this of you haven't yet:
https://costaricaticas.com/phpBB2/viewtopic.php?t=16357
Enjoy your trip.