Seeking Help Proxy & Anti-Detect Browser Recommendations

[Flashid]

I'm planning a social media matrix project that requires managing over 50 professional accounts across 5 major platforms simultaneously (Instagram, YouTube, TikTok, Twitter, and LinkedIn). I'm somewhat confused about proxy and anti-detect browser selection:

1. With a limited budget, which proxy service providers offer the most stable solutions with good anti-banning effects? Would static residential proxies or rotating proxies be more suitable for my needs?
2. Besides AdsPower and Multilogin, what are some cost-effective anti-detect browsers you would recommend? I'm particularly interested in fingerprint spoofing technology and account isolation capabilities.
3. Regarding long-term account stability, what operational strategies beyond tool selection could reduce the risk of bans? For example, management approaches for device environments, behavioral patterns, and network IPs.
4. If I need to hand over these mature accounts to team members for use, what's the safest way to transfer account permissions? Do I need to continue using the original proxy and browser configuration? Will different team members' devices affect account security?

Thank you experienced seniors for sharing your valuable advice! Any specific service provider names, configuration parameters, or best practice case studies would be greatly appreciated!