Here's a recommendation from SouthFayetteFan on pacing, which answer's your question regarding Chase applications:
https://www.disboards.com/threads/i...t-page-for-addl-details.3729982/post-61161429
Many here apply for biz cards, even if you have just a small side hustle, like selling things on eBay or Facebook marketplace, etc. If you are already 3/24 and can see yourself really getting involved in CCs, this is something you will want to consider. Especially in one-player mode, as it will extend your ability to open cards while staying under 5/24, if you so desire.
Amex cards are easy to get approved for and the space between a Chase application and Amex application isn't an issue. Personal cards will count towards your 5/24 count. Biz cards will not.
VentureX (Capital One) has been getting a lot of attention lately and has a new sign up bonus with a smaller SUB.