In this design, yes, the blade of the utility power meter mates with the jaw of the meter socket. Suitability for your application will depend on utility approval, however. The utility should be able to tell you if MC0816B1400RLTM is on their approval list. With the utility name we may be able to provide this information.
XPT060 is a 12oz container of ANSI-61 touch up paint. Contact Home Depot staff for availability or use the below link to find a Siemens distributor in your area. https://new.siemens.com/us/en/company/distributorlocator.html
The method described is not the proper way to securely mount the Meter Combo. The product is not meant to be on a pole. We would not be able to sanction for liability reasons.
MC0816B1400RLTM is on the MEG approval list but cannot be pole mounted securely. Wall mount only. Please refer to wiring diagram link. The SD1 disconnect as shown is limited to 200A maximum using a Type QNR breaker. The feed-thru lugs can be used to feed a 150-175A subpanel. https://www.downloads.siemens.com/download-center/Download.aspx?pos=download&fct=getasset&id1=BTLV_44346
Provision for the 200A maximum SD1 "sub-main" as shown in link is for a Type QNR (10kA rated) or QNRH (22kA). SD2 main comes factory-installed with a 22kA QN2200RH. https://www.downloads.siemens.com/download-center/Download.aspx?pos=download&fct=getasset&id1=BTLV_44346
Yes, you can do this as per the wiring diagram for MC0816B1400RLTM (see link). Type QNR breakers are approved branch breakers. Note doing so will utilize all 8 spaces. https://s3.amazonaws.com/dcc-data-extract/new-delta/asset/Compas/daily/Compas/2019-08-21/Wiring%20Diagram/SIE_WD_MC0816B1400RLTM.pdf
The MC0816B1400RLTM is ringless
Yes, as long is it is a Type QP or other approved branch breaker as per wiring diagram. To download the wiring diagram for this item go to link below and click on "Downloads" and enter MC0816B1400RLTM in the search box. https://w3.usa.siemens.com/powerdistribution/us/en/Pages/low-medium-voltage.aspx
No. The meter would be supplied by the utility and would be a plug in meter. You should always contact your local utility for a list of approved metering devices prior to purchase and installation.
Siemens does not have a line of combination meter centers marketed for use in mobile homes like we do with load centers. It would be up to the local authority having jurisdiction (AHJ) as to whether the device in question should be used.