consultation for technical issues

Hi there.. Im looking for some expert of mobile and web development for consultation session for specified period and he should have experience with those subjects: 1-cost of google maps integration for a website and mobile app and how the bill will be charged (loading the map, zoom in, pin location, get location regional hierarchy from the pinned location, get location coordinate based on location name)? Cost of static maps? 2-explore different alternatives of google maps in term of cost and usability (at least three)? 3-cost of whatsapp business API request for either both customer initiated request and company initiated request 4-Cost of hosting multimedia (videos and photos) for approximately 100 tera size 5-ability to create crawler engine to fetch particular data template from other websites for example mobile number 6-ability to create video streaming from one mobile to unlimited number of mobiles? And how it will be implemented to avoid delay with good enough usability? 7-best way to document requirements by user? 8-ability to adapt blockchain for e-commerce website (selling and buying second hand stuff) between unverified users? 9-ideal programming language that is capable to build above functions (google maps, whatsapp integration, blockchain,...etc) to develop mobile application (native/hyperid) 10-Nominate five companies with excellent capabilities in UX, mobile Dev, webDev, e-commerce to implement the project (looking for company not individuals)? and do you recommend to implement UX aspects with specialized company and which one is before? Or you can work to compare those companies which we selected already (Prismetric, RichestSoft, Innofied Solution, Excellent WebWorld) Thanks,,