Cisco Cost-Efficient solution for 802.11ac +4G

Client Requirement:
1. Wireless implement for all company environment (gigabit- ethernet)
2. Only Cisco solution
4. All mobile device connect to (specified 4G), 3G won't accept

Scenario :  If it is about the SLT meeting, I’ll get a debrief from the CEO office first. Our most basic requirement was to allow users to connect in a meeting space to a wi-fi device(s) or services for up to 40 concurrent users. We will connect laptops or mobile devices to this wireless device. Can you suggest some options fir
st, pending further discussions and any more detail? (gigabit wifi, and 4 )

Cisco solution, all 800 series,( integrate service routers ) can't support both 4G, and WiFi

Solution:
1. C1941-HW/K9:  Cisco 1941 Hardware Only Bundle
2. Modules:
     EHWIC-4G-LTE-G:  4G LTE EHWIC for Global, 800/900/1800/2100/2600 MHz
     EHWIC-4ESG-P : Four port 10/100/1000 Ethernet switch interface card w/PoE 
     ISM-SRE-300-K9 :Services Ready Engine 300 (512MB MEM, 4GB Flash, 1C CPU)-WLC
3. AP:
    AIR-CAP2702I-A-K9 : 802.11ac CAP w/CleanAir; 3x4:3SS; Int Ant; A Reg Domain